Implement sudoku solver with several programming languages.

"fill-able" cell meaning cell that has only one possibility of digit to fill.

1. Level A: Start with some already fill-able cell
2. Level B: Start with no fill-able cell at start

0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 2 7
4 0 0 6 0 8 0 0 0
0 7 1 0 0 0 3 0 0
2 3 8 5 0 6 4 1 9
9 6 4 1 0 0 7 5 0
3 9 5 0 2 7 8 0 0
1 8 2 0 6 0 9 7 4
0 4 6 8 1 9 2 0 5

0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 1 4 0
5 0 0 0 7 6 0 8 0
0 1 2 4 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 3 0 5 0 0 6
0 0 0 1 0 0 0 0 0
6 0 0 0 0 0 0 0 7
0 0 3 0 0 9 0 0 0

• Level A
• Level B

• Level A
• Level B

version: 3.6.2 with Anaconda custom

• Level A
• Level B