0 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 2 5 2 6 2 8 3 5 3 7 4 7 4 8 5 7 5 8 6 8 6 9 7 8 8 9 0 6 0 9 0 8
next
->