S = input()
T = input()

if len(T) == 1:
    print(-1)
    exit()

result = 0
p = 0
while True:
    p = S.find(T, p)
    if p == -1:
        break
    S = S[:p + len(T) - 1] + '.' + S[p + len(T) - 1:]
    result += 1
print(result)