Given an integer n, create a function that returns the length of the repeating cycle of the sequence 1/n. If the cycle is non-repetitive, return -1.
repeating_cycle(13) ➞ 6
# 1/13 = 0.076923 076923 076923 076923 ...
# length of `076923` is 6.
repeating_cycle(5) ➞ -1
# 1/5 = 0.2 (non-repeative)
repeating_cycle(33) ➞ 2
# 1/33 = 0.03 03 03 03 03 03 03 03
# length of `03` is 2
repeating_cycle(197) ➞ 98
Return -1 if the repeating cycle does not start from the first decimal place. As an example, 1/22 = 0.0 45 45 45 45, your function should return -1 in this case.