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