6
8
7
2
8
3
9
2
7
1
8
2
9
2
3
3
4
5
1
4
9
6
8
6
8
5
4
2
3
7
5
Sudoku became a global phenomenon in 2004 after The Times of London started publishing it daily.
Sudoku became a global phenomenon in 2004 after The Times of London started publishing it daily.
Sudoku became a global phenomenon in 2004 after The Times of London started publishing it daily.
Sudoku became a global phenomenon in 2004 after The Times of London started publishing it daily.