----------------------------------- 
| .   .   . | 9   .   2 | .   .   . |
|           |           |           |
| 8   .   . | .   4   . | .   .   3 |
|           |           |           |
| .   4   . | 7   .   . | 1   .   . |
|-----------------------------------|
| .   .   6 | .   .   9 | .   .   1 |
|           |           |           |
| .   2   . | .   .   . | .   7   . |
|           |           |           |
| 5   .   . | 3   .   . | 4   .   . |
|-----------------------------------|
| .   .   7 | .   .   3 | .   6   . |
|           |           |           |
| 6   .   . | .   1   . | .   .   5 |
|           |           |           |
| .   .   . | 2   .   6 | .   .   . |
 ----------------------------------- 

 ----------------------------------- 
| .   .   . | .   6   7 | .   9   5 |
|           |           |           |
| .   .   . | .   .   2 | 7   .   . |
|           |           |           |
| .   .   . | .   4   . | 2   1   . |
|-----------------------------------|
| .   .   4 | .   .   . | .   .   2 |
|           |           |           |
| .   .   7 | 8   .   3 | 9   .   . |
|           |           |           |
| 1   .   . | .   .   . | 8   .   . |
|-----------------------------------|
| .   5   9 | .   7   . | .   .   . |
|           |           |           |
| .   .   8 | 6   .   . | .   .   . |
|           |           |           |
| 3   4   . | 5   8   . | .   .   . |
 ----------------------------------- 

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| .   1   . | .   .   3 | 2   9   . |
|           |           |           |
| 2   .   . | 9   .   . | .   .   . |
|           |           |           |
| 6   .   . | .   5   . | .   .   . |
|-----------------------------------|
| 9   2   . | .   .   7 | .   .   . |
|           |           |           |
| .   .   7 | .   .   . | 4   .   . |
|           |           |           |
| .   .   . | 5   .   . | .   8   9 |
|-----------------------------------|
| .   .   . | .   6   . | .   .   5 |
|           |           |           |
| .   .   . | .   .   5 | .   .   1 |
|           |           |           |
| .   9   4 | 8   .   . | .   6   . |
 ----------------------------------- 

 ----------------------------------- 
| 4   1   . | .   .   . | 7   .   . |
|           |           |           |
| .   .   . | .   2   . | 4   5   . |
|           |           |           |
| .   .   2 | .   .   1 | .   .   . |
|-----------------------------------|
| .   7   . | 9   .   5 | .   .   3 |
|           |           |           |
| .   6   . | .   .   . | .   4   . |
|           |           |           |
| 3   .   . | 4   .   8 | .   9   . |
|-----------------------------------|
| .   .   . | 3   .   . | 8   .   . |
|           |           |           |
| .   4   6 | .   8   . | .   .   . |
|           |           |           |
| .   .   8 | .   .   . | .   1   5 |
 ----------------------------------- 

 ----------------------------------- 
| .   9   . | 8   .   . | 3   .   6 |
|           |           |           |
| 7   .   . | .   .   . | .   .   . |
|           |           |           |
| .   .   3 | 6   .   9 | .   .   . |
|-----------------------------------|
| 6   .   . | 7   .   . | .   1   . |
|           |           |           |
| .   4   9 | 2   .   8 | 6   7   . |
|           |           |           |
| .   7   . | .   .   4 | .   .   2 |
|-----------------------------------|
| .   .   . | 5   .   6 | 1   .   . |
|           |           |           |
| .   .   . | .   .   . | .   .   9 |
|           |           |           |
| 5   .   7 | .   .   1 | .   4   . |
 ----------------------------------- 

 ----------------------------------- 
| .   .   5 | .   2   . | .   3   . |
|           |           |           |
| .   2   . | 7   .   . | .   .   . |
|           |           |           |
| .   .   1 | .   4   6 | .   .   . |
|-----------------------------------|
| 1   4   . | 9   .   . | 8   .   . |
|           |           |           |
| 5   .   . | .   .   . | .   .   9 |
|           |           |           |
| .   .   6 | .   .   2 | .   1   4 |
|-----------------------------------|
| .   .   . | 4   3   . | 2   .   . |
|           |           |           |
| .   .   . | .   .   7 | .   8   . |
|           |           |           |
| .   7   . | .   8   . | 6   .   . |
 ----------------------------------- 

 ----------------------------------- 
| .   .   2 | .   7   . | 9   3   . |
|           |           |           |
| .   .   . | .   9   . | .   .   4 |
|           |           |           |
| .   .   . | .   .   1 | .   2   . |
|-----------------------------------|
| .   8   . | .   .   3 | .   .   1 |
|           |           |           |
| .   .   7 | 9   5   2 | 6   .   . |
|           |           |           |
| 2   .   . | 8   .   . | .   9   . |
|-----------------------------------|
| .   3   . | 1   .   . | .   .   . |
|           |           |           |
| 4   .   . | .   8   . | .   .   . |
|           |           |           |
| .   9   5 | .   6   . | 8   .   . |
 ----------------------------------- 

 ----------------------------------- 
| 6   .   . | .   .   9 | .   .   . |
|           |           |           |
| .   .   7 | .   1   . | 9   3   . |
|           |           |           |
| .   .   . | .   .   2 | .   6   7 |
|-----------------------------------|
| .   .   5 | .   .   4 | .   2   . |
|           |           |           |
| 3   .   . | .   .   . | .   .   6 |
|           |           |           |
| .   7   . | 8   .   . | 4   .   . |
|-----------------------------------|
| 1   5   . | 2   .   . | .   .   . |
|           |           |           |
| .   3   8 | .   6   . | 1   .   . |
|           |           |           |
| .   .   . | 4   .   . | .   .   3 |
 ----------------------------------- 

 ----------------------------------- 
| .   3   7 | 2   .   . | .   .   . |
|           |           |           |
| 6   .   . | 4   3   . | .   .   . |
|           |           |           |
| .   1   . | .   .   7 | .   .   . |
|-----------------------------------|
| 1   5   . | .   .   4 | .   2   . |
|           |           |           |
| .   8   . | .   .   . | .   7   . |
|           |           |           |
| .   6   . | 8   .   . | .   4   9 |
|-----------------------------------|
| .   .   . | 1   .   . | .   6   . |
|           |           |           |
| .   .   . | .   7   5 | .   .   2 |
|           |           |           |
| .   .   . | .   .   3 | 9   8   . |
 ----------------------------------- 

 ----------------------------------- 
| .   .   . | .   4   . | 5   .   6 |
|           |           |           |
| .   .   3 | 5   .   . | .   .   . |
|           |           |           |
| .   6   . | 2   .   . | .   1   . |
|-----------------------------------|
| .   .   8 | .   .   7 | .   3   . |
|           |           |           |
| 9   .   6 | .   .   . | 8   .   1 |
|           |           |           |
| .   5   . | 8   .   . | 7   .   . |
|-----------------------------------|
| .   1   . | .   .   5 | .   4   . |
|           |           |           |
| .   .   . | .   .   9 | 2   .   . |
|           |           |           |
| 5   .   2 | .   8   . | .   .   . |
 ----------------------------------- 

 ----------------------------------- 
| .   .   . | 3   .   . | 9   .   . |
|           |           |           |
| .   6   . | .   9   . | .   .   2 |
|           |           |           |
| .   .   . | .   1   4 | 8   5   . |
|-----------------------------------|
| 7   4   . | .   .   1 | .   6   . |
|           |           |           |
| .   .   . | .   .   . | .   .   . |
|           |           |           |
| .   2   . | 7   .   . | .   9   4 |
|-----------------------------------|
| .   1   3 | 2   8   . | .   .   . |
|           |           |           |
| 9   .   . | .   7   . | .   2   . |
|           |           |           |
| .   .   2 | .   .   5 | .   .   . |
 ----------------------------------- 

 ----------------------------------- 
| .   .   2 | .   6   . | .   .   1 |
|           |           |           |
| .   .   6 | 4   .   . | .   2   . |
|           |           |           |
| 4   7   . | 2   .   . | .   .   9 |
|-----------------------------------|
| 1   4   9 | .   .   . | .   .   . |
|           |           |           |
| 6   .   . | .   .   . | .   .   8 |
|           |           |           |
| .   .   . | .   .   . | 5   9   4 |
|-----------------------------------|
| 2   .   . | .   .   8 | .   4   3 |
|           |           |           |
| .   6   . | .   .   1 | 9   .   . |
|           |           |           |
| 5   .   . | .   9   . | 7   .   . |
 ----------------------------------- 

 ----------------------------------- 
| .   .   . | .   3   . | .   8   . |
|           |           |           |
| 7   3   . | 4   .   . | 9   .   . |
|           |           |           |
| 1   .   5 | .   .   8 | .   .   . |
|-----------------------------------|
| .   5   . | .   .   4 | 7   .   . |
|           |           |           |
| 9   .   . | .   .   . | .   .   4 |
|           |           |           |
| .   .   6 | 1   .   . | .   5   . |
|-----------------------------------|
| .   .   . | 7   .   . | 8   .   3 |
|           |           |           |
| .   .   7 | .   .   5 | .   6   9 |
|           |           |           |
| .   9   . | .   8   . | .   .   . |
 ----------------------------------- 

 ----------------------------------- 
| .   .   . | .   .   9 | .   .   2 |
|           |           |           |
| .   .   . | 6   2   . | 8   5   7 |
|           |           |           |
| .   .   . | 3   .   . | .   1   . |
|-----------------------------------|
| 9   .   . | 4   .   . | 6   .   . |
|           |           |           |
| .   1   . | .   .   . | .   7   . |
|           |           |           |
| .   .   8 | .   .   2 | .   .   4 |
|-----------------------------------|
| .   5   . | .   .   7 | .   .   . |
|           |           |           |
| 7   3   2 | .   6   8 | .   .   . |
|           |           |           |
| 4   .   . | 2   .   . | .   .   . |
 ----------------------------------- 

 ----------------------------------- 
| .   .   8 | .   6   4 | .   .   . |
|           |           |           |
| 1   .   . | .   .   . | .   .   . |
|           |           |           |
| .   4   2 | .   .   . | 7   .   . |
|-----------------------------------|
| .   5   . | .   .   7 | .   6   . |
|           |           |           |
| 8   .   . | 3   .   1 | .   .   2 |
|           |           |           |
| .   3   . | 9   .   . | .   8   . |
|-----------------------------------|
| .   .   9 | .   .   . | 8   5   . |
|           |           |           |
| .   .   . | .   .   . | .   .   3 |
|           |           |           |
| .   .   . | 7   8   . | 1   .   . |
 ----------------------------------- 

 ----------------------------------- 
| 3   .   . | .   2   . | .   .   1 |
|           |           |           |
| .   .   5 | .   .   . | .   .   . |
|           |           |           |
| .   .   . | 6   .   5 | 9   8   . |
|-----------------------------------|
| .   .   6 | .   .   7 | .   .   . |
|           |           |           |
| 7   9   . | .   .   . | .   1   2 |
|           |           |           |
| .   .   . | 2   .   . | 3   .   . |
|-----------------------------------|
| .   3   4 | 9   .   2 | .   .   . |
|           |           |           |
| .   .   . | .   .   . | 8   .   . |
|           |           |           |
| 1   .   . | .   5   . | .   .   3 |
 ----------------------------------- 

 ----------------------------------- 
| 9   .   . | .   2   7 | .   .   . |
|           |           |           |
| .   5   . | .   .   . | .   .   . |
|           |           |           |
| .   1   2 | 9   .   . | .   .   4 |
|-----------------------------------|
| 8   .   7 | .   .   6 | .   5   . |
|           |           |           |
| .   .   . | .   .   . | .   .   . |
|           |           |           |
| .   4   . | 3   .   . | 6   .   7 |
|-----------------------------------|
| 3   .   . | .   .   8 | 4   7   . |
|           |           |           |
| .   .   . | .   .   . | .   9   . |
|           |           |           |
| .   .   . | 1   5   . | .   .   2 |
 ----------------------------------- 

 ----------------------------------- 
| .   .   . | 5   .   8 | .   2   . |
|           |           |           |
| 4   .   . | .   .   . | 8   .   . |
|           |           |           |
| .   9   8 | 7   .   . | .   4   . |
|-----------------------------------|
| .   3   . | .   .   . | .   .   1 |
|           |           |           |
| .   .   6 | 1   .   4 | 9   .   . |
|           |           |           |
| 7   .   . | .   .   . | .   8   . |
|-----------------------------------|
| .   8   . | .   .   1 | 4   6   . |
|           |           |           |
| .   .   1 | .   .   . | .   .   3 |
|           |           |           |
| .   4   . | 3   .   9 | .   .   . |
 ----------------------------------- 

 ----------------------------------- 
| 1   .   2 | 3   .   . | .   4   . |
|           |           |           |
| 6   7   . | .   .   . | .   .   8 |
|           |           |           |
| .   .   4 | 5   .   . | .   .   2 |
|-----------------------------------|
| 5   .   . | 9   8   . | .   .   . |
|           |           |           |
| .   4   . | .   .   . | .   8   . |
|           |           |           |
| .   .   . | .   3   1 | .   .   6 |
|-----------------------------------|
| 7   .   . | .   .   2 | 8   .   . |
|           |           |           |
| 3   .   . | .   .   . | .   2   1 |
|           |           |           |
| .   2   . | .   .   3 | 6   .   5 |
 ----------------------------------- 

 ----------------------------------- 
| 2   .   4 | 1   .   . | .   .   . |
|           |           |           |
| .   .   . | .   .   . | 2   .   1 |
|           |           |           |
| .   5   6 | .   .   7 | 8   .   . |
|-----------------------------------|
| 4   .   2 | .   6   . | .   .   . |
|           |           |           |
| 9   .   . | .   .   . | .   .   5 |
|           |           |           |
| .   .   . | .   2   . | 1   .   8 |
|-----------------------------------|
| .   .   5 | 9   .   . | 7   8   . |
|           |           |           |
| 3   .   7 | .   .   . | .   .   . |
|           |           |           |
| .   .   . | .   .   5 | 3   .   6 |
 ----------------------------------- 

 ----------------------------------- 
| .   .   2 | .   .   3 | 4   .   . |
|           |           |           |
| 8   .   . | .   9   . | .   .   . |
|           |           |           |
| .   .   5 | 4   .   . | .   .   9 |
|-----------------------------------|
| .   6   . | .   .   5 | 1   .   3 |
|           |           |           |
| .   .   . | .   .   . | .   .   . |
|           |           |           |
| 5   .   4 | 9   .   . | .   7   . |
|-----------------------------------|
| 7   .   . | .   .   8 | 5   .   . |
|           |           |           |
| .   .   . | .   3   . | .   .   1 |
|           |           |           |
| .   .   8 | 2   .   . | 3   .   . |
 ----------------------------------- 

 ----------------------------------- 
| .   .   8 | .   .   3 | .   1   4 |
|           |           |           |
| .   .   . | .   6   . | 2   .   . |
|           |           |           |
| .   .   . | .   9   . | .   .   5 |
|-----------------------------------|
| .   2   . | 4   .   . | 8   .   . |
|           |           |           |
| .   3   . | .   5   . | .   7   . |
|           |           |           |
| .   .   7 | .   .   1 | .   2   . |
|-----------------------------------|
| 5   .   . | .   8   . | .   .   . |
|           |           |           |
| .   .   6 | .   1   . | .   .   . |
|           |           |           |
| 7   1   . | 2   .   . | 6   .   . |
 ----------------------------------- 

 ----------------------------------- 
| 1   .   . | .   .   . | 9   .   . |
|           |           |           |
| .   4   . | 9   .   3 | .   .   . |
|           |           |           |
| 8   .   . | .   4   . | .   .   5 |
|-----------------------------------|
| 5   .   . | 6   2   . | .   4   . |
|           |           |           |
| .   .   1 | .   9   . | 5   .   . |
|           |           |           |
| .   8   . | .   3   5 | .   .   7 |
|-----------------------------------|
| 3   .   . | .   5   . | .   .   1 |
|           |           |           |
| .   .   . | 3   .   6 | .   7   . |
|           |           |           |
| .   .   4 | .   .   . | .   .   3 |
 ----------------------------------- 

 ----------------------------------- 
| .   .   . | .   .   . | .   .   5 |
|           |           |           |
| .   .   2 | 4   9   . | .   1   . |
|           |           |           |
| .   .   . | 1   .   7 | .   9   8 |
|-----------------------------------|
| 1   .   . | .   7   . | .   2   . |
|           |           |           |
| .   .   5 | .   .   . | 6   .   . |
|           |           |           |
| .   3   . | .   2   . | .   .   4 |
|-----------------------------------|
| 5   7   . | 6   .   8 | .   .   . |
|           |           |           |
| .   6   . | .   1   4 | 5   .   . |
|           |           |           |
| 4   .   . | .   .   . | .   .   . |
 ----------------------------------- 

 ----------------------------------- 
| .   .   . | .   9   . | 2   5   . |
|           |           |           |
| .   .   . | .   .   1 | .   9   . |
|           |           |           |
| 1   .   . | .   .   2 | .   .   7 |
|-----------------------------------|
| 5   .   3 | .   .   . | .   7   8 |
|           |           |           |
| .   4   . | .   .   . | .   3   . |
|           |           |           |
| 8   7   . | .   .   . | 6   .   4 |
|-----------------------------------|
| 6   .   . | 4   .   . | .   .   3 |
|           |           |           |
| .   9   . | 7   .   . | .   .   . |
|           |           |           |
| .   3   8 | .   2   . | .   .   . |
 ----------------------------------- 

 ----------------------------------- 
| .   1   4 | .   .   3 | 2   .   . |
|           |           |           |
| .   .   . | .   4   . | .   .   . |
|           |           |           |
| .   7   . | 1   6   . | .   4   . |
|-----------------------------------|
| .   .   1 | .   .   7 | .   6   . |
|           |           |           |
| 2   .   . | .   .   . | .   .   1 |
|           |           |           |
| .   9   . | 6   .   . | 5   .   . |
|-----------------------------------|
| .   5   . | .   8   2 | .   7   . |
|           |           |           |
| .   .   . | .   3   . | .   .   . |
|           |           |           |
| .   .   7 | 9   .   . | 4   1   . |
 ----------------------------------- 

 ----------------------------------- 
| .   .   7 | .   6   5 | .   .   . |
|           |           |           |
| 1   .   2 | .   .   . | .   .   . |
|           |           |           |
| .   .   . | 1   .   4 | .   .   6 |
|-----------------------------------|
| .   .   3 | .   5   . | .   .   . |
|           |           |           |
| 2   8   . | .   .   . | .   5   1 |
|           |           |           |
| .   .   . | .   4   . | 6   .   . |
|-----------------------------------|
| 9   .   . | 6   .   8 | .   .   . |
|           |           |           |
| .   .   . | .   .   . | 2   .   8 |
|           |           |           |
| .   .   . | 5   7   . | 3   .   . |
 ----------------------------------- 

 ----------------------------------- 
| .   6   . | .   .   4 | 2   .   . |
|           |           |           |
| 7   .   . | .   8   . | .   .   . |
|           |           |           |
| 4   1   2 | .   .   3 | .   .   . |
|-----------------------------------|
| .   .   . | 9   .   . | .   1   4 |
|           |           |           |
| .   .   5 | .   .   . | 8   .   . |
|           |           |           |
| 9   2   . | .   .   1 | .   .   . |
|-----------------------------------|
| .   .   . | 4   .   . | 6   7   3 |
|           |           |           |
| .   .   . | .   7   . | .   .   5 |
|           |           |           |
| .   .   7 | 5   .   . | .   2   . |
 ----------------------------------- 

 ----------------------------------- 
| .   .   8 | 2   .   . | .   .   . |
|           |           |           |
| .   7   . | .   5   . | 6   .   . |
|           |           |           |
| 5   .   . | .   .   4 | .   1   . |
|-----------------------------------|
| 1   .   5 | .   7   . | 9   .   . |
|           |           |           |
| .   .   . | 1   .   9 | .   .   . |
|           |           |           |
| .   .   3 | .   2   . | 1   .   7 |
|-----------------------------------|
| .   4   . | 5   .   . | .   .   2 |
|           |           |           |
| .   .   1 | .   3   . | .   4   . |
|           |           |           |
| .   .   . | .   .   6 | 5   .   . |
 ----------------------------------- 

 ----------------------------------- 
| 1   .   7 | .   .   . | .   .   9 |
|           |           |           |
| .   .   5 | 9   2   . | .   8   . |
|           |           |           |
| .   .   . | .   3   1 | .   .   . |
|-----------------------------------|
| .   7   . | .   .   . | 8   .   6 |
|           |           |           |
| .   .   . | .   .   . | .   .   . |
|           |           |           |
| 4   .   9 | .   .   . | .   2   . |
|-----------------------------------|
| .   .   . | 6   4   . | .   .   . |
|           |           |           |
| .   8   . | .   9   3 | 1   .   . |
|           |           |           |
| 2   .   . | .   .   . | 6   .   5 |
 ----------------------------------- 

 ----------------------------------- 
| 5   .   . | .   .   . | .   4   . |
|           |           |           |
| .   .   . | .   .   9 | .   7   6 |
|           |           |           |
| .   .   . | 7   .   8 | 5   .   . |
|-----------------------------------|
| .   7   . | .   .   6 | .   8   . |
|           |           |           |
| 4   .   . | .   9   . | .   .   2 |
|           |           |           |
| .   9   . | 8   .   . | .   3   . |
|-----------------------------------|
| .   .   9 | 1   .   3 | .   .   . |
|           |           |           |
| 2   8   . | 5   .   . | .   .   . |
|           |           |           |
| .   3   . | .   .   . | .   .   8 |
 ----------------------------------- 

 ----------------------------------- 
| .   4   . | 6   1   . | 9   .   . |
|           |           |           |
| 5   .   . | .   7   . | .   1   2 |
|           |           |           |
| .   .   . | .   .   . | .   .   8 |
|-----------------------------------|
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|           |           |           |
| .   .   . | .   .   . | .   .   . |
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| .   6   . | 1   8   . | 3   .   . |
|-----------------------------------|
| 8   .   . | .   .   . | .   .   . |
|           |           |           |
| 6   1   . | .   2   . | .   .   5 |
|           |           |           |
| .   .   9 | .   5   6 | .   7   . |
 ----------------------------------- 

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| 5   .   . | .   7   . | .   .   3 |
|           |           |           |
| 1   2   . | .   .   . | 5   .   . |
|           |           |           |
| .   .   8 | .   .   9 | .   .   . |
|-----------------------------------|
| 9   .   2 | 1   3   . | .   .   . |
|           |           |           |
| .   7   . | .   .   . | .   6   . |
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| .   .   . | .   2   7 | 3   .   8 |
|-----------------------------------|
| .   .   . | 8   .   . | 9   .   . |
|           |           |           |
| .   .   4 | .   .   . | .   1   2 |
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| 8   .   . | .   1   . | .   .   6 |
 ----------------------------------- 

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| .   .   . | 6   .   . | .   .   . |
|           |           |           |
| .   1   3 | .   9   . | .   .   4 |
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| 9   6   . | .   2   . | .   .   1 |
|-----------------------------------|
| .   .   . | .   .   . | 5   2   6 |
|           |           |           |
| .   2   . | .   .   . | .   8   . |
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| 6   8   9 | .   .   . | .   .   . |
|-----------------------------------|
| 8   .   . | .   7   . | .   4   2 |
|           |           |           |
| 4   .   . | .   5   . | 6   7   . |
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| .   .   . | .   .   3 | .   .   . |
 ----------------------------------- 

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| .   .   9 | .   4   6 | .   .   3 |
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| 6   .   . | .   .   . | 1   .   . |
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| .   8   . | .   .   5 | .   .   . |
|-----------------------------------|
| .   .   . | .   .   7 | .   8   4 |
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| 1   .   . | .   .   . | .   .   2 |
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| 9   3   . | 5   .   . | .   .   . |
|-----------------------------------|
| .   .   . | 9   .   . | .   6   . |
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| .   .   7 | .   .   . | .   .   8 |
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| 5   .   . | 7   2   . | 4   .   . |
 ----------------------------------- 

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| .   .   . | .   .   4 | .   .   . |
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| .   4   . | .   .   . | .   .   2 |
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| .   .   6 | 7   .   . | .   9   . |
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| 2   1   . | .   .   . | .   7   3 |
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| .   8   . | .   .   2 | 4   .   . |
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| 5   .   . | .   .   . | .   8   . |
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 ----------------------------------- 

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| 9   .   . | .   .   3 | .   7   . |
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| .   .   . | 9   .   4 | .   .   . |
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| .   8   . | .   .   . | .   3   . |
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| .   .   4 | 2   .   . | 7   9   . |
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 ----------------------------------- 

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| .   .   . | 2   .   6 | .   .   9 |
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| 5   .   . | .   .   8 | .   .   . |
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| .   4   . | .   7   . | .   2   . |
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| 2   .   1 | .   .   . | 8   9   . |
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| .   8   . | .   .   . | .   1   . |
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| .   6   9 | .   .   . | 7   .   3 |
|-----------------------------------|
| .   5   . | .   2   . | .   7   . |
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| .   .   . | 8   .   . | .   .   1 |
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| 9   .   . | 4   .   7 | .   .   . |
 ----------------------------------- 

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| .   .   . | .   .   6 | .   1   . |
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| .   5   . | .   .   2 | .   .   3 |
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| 7   .   9 | .   .   . | 6   .   . |
|-----------------------------------|
| .   8   . | .   .   1 | .   .   . |
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| .   .   3 | 6   .   8 | 7   .   . |
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| .   .   . | 3   .   . | .   4   . |
|-----------------------------------|
| .   .   8 | .   .   . | 4   .   9 |
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| 9   .   . | 5   .   . | .   6   . |
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| .   4   . | 7   .   . | .   .   . |
 -----------------------------------