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