SUDOKU
Write a number from 1 to 9 into each empty square in the grid so that every number from 1 to 9 appears exactly once in each horizontal row, each vertical column, and each 3×3 block.
3
2
7
2
7
5
8
4
1
6
9
1
4
2
1
6
8
5
3
4
8
6
5
3
4
* Easy