Chef Digit Jump clarificiation: can chef jump back to more than one index if digit same

What is meant by Chef can't jump out from sequence, can he jump back to same same number

What is result for this test case

0 1 2 3 4 5 9 6 7 8 9 0 1 2 3 4 5

is it 5: 0 - 11 -> 10 -> 6 -> 5 -> 16

or 6

0 -> 1 -> 2 -> 3 -> 4 -> 5 -> 16