What are the two missing numbers in the series? _ ; _ ; 3 ; 3 ; 7 ; 7 ; 2 ; 3 ; 6 ; 5

Question

In series 6,4,1,2,2,8,7,4,2,1,5,3,8,6,2,1,7,1,4,1,3,2,8,7,6, how many pairs of successive numbers have a difference of 1 each?

Answer 1

1;1
3;3
7;7
2;3
6;5