Re.start() & Re.end()

import re
first=input()
second=input()
pattern=re.compile(second)
r=pattern.search(first)
if not r: print("(-1, -1)")
else:
    while r:
        print("({0}, {1})".format(r.start(), r.end() - 1))
        r = pattern.search(first,r.start() + 1)