s = input()
t = input()

ans = 0
i = 0
while i < len(s) - len(t) + 1:
    if s[i : i + len(t)] == t:
        if len(t) == 1:
            ans = -1
            break
        ans += 1
        i += len(t) - 2
    i += 1

print(ans)