import sys

sys.setrecursionlimit(10 ** 8)

input = sys.stdin.readline


def main():
    S = input().strip()
    T = input().strip()

    if len(T) == 1:
        print(-1)
    else:
        ans = 0
        while S.count(T) != 0:
            x = S.find(T)
            S = S[:x + len(T) - 1] + "." + S[x + len(T) - 1:]
            ans += 1

        print(ans)


if __name__ == '__main__':
    main()