#!/usr/bin/env python3
# %%
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines


# %%
S, T = read().decode().split()

# %%
if len(T) == 1:
    if S.count(T) > 0:
        print(-1)
    else:
        print(0)
    exit()


# %%
U = '.'.join([T[:-1], T[-1]])
answer = 0
while True:
    i = S.find(T)
    if i == -1:
        break
    S = S[i + len(T) - 1:]
    answer += 1

print(answer)