5
4
8
1
3
2
4
1
6
8
1
6
2
4
7
8
8
5
1
3
1
7
5
1
9
8
4
2
5
3
9
7
6
2
5
8
Sudoku was popularized worldwide by Wayne Gould, who spent 6 years writing a computer program to generate puzzles.
Sudoku was popularized worldwide by Wayne Gould, who spent 6 years writing a computer program to generate puzzles.
Sudoku was popularized worldwide by Wayne Gould, who spent 6 years writing a computer program to generate puzzles.
Sudoku was popularized worldwide by Wayne Gould, who spent 6 years writing a computer program to generate puzzles.