If you can't sleep, just count sheep!!
## Task:
Given a non-negative integer, `3` for example, return a string with a murmur: `"1 sheep...2 sheep...3 sheep..."`.  Input will always be valid, i.e. no negative integers.
def count_sheep(n):
    return "".join("%d sheep..." % (i + 1) for i in range(n))
def count_sheep(n):
    return "".join("%d sheep..." % (i + 1) for i in range(n))