s = list(input())
t = list(input())
ns = len(s)
nt = len(t)


if len(t) == 1 and s.count(t) > 0:
    print(-1)
else:
    cnt = 0
    for i in range(ns - nt + 1):
        if s[i:i+nt] == t:
            cnt += 1
            s[i+nt-2] = "."
    print(cnt)