S = input()
T = input()

result = 0
p = 0
n = len(T) - 1
if n == 0:
    print(-1)
    exit()

while True:
    p = S.find(T, p)
    if p == -1:
        break
    p += n
    result += 1

t = 0
while True:
    p = S.rfind(T, 0, p)
    if p == -1:
        break
    p += 1
    t += 1

print(min(result, t))