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