S = list(input())
T = input()
NT = len(T)
if NT == 1 and T in S:
    print(-1)
    exit()
cnt = 0
pont = 0
while pont < len(S)-NT+1:
    s = ''.join(S[pont:pont+NT])
    if s == T:
        S.insert(pont+NT-1,'.')
        cnt += 1
    pont += 1
print(cnt)