S = input()
T = input()
T_length = len(T)

if T_length == 1 and T in S:
    print(-1)
    exit()

count = 0
while True:
    i = S.find(T)
    if i == -1:
        print(count)
        exit()
    count += 1
    S = S[i + T_length - 1:]