import sys
input = sys.stdin.readline

s, t = input().rstrip(), input().rstrip()
t_len = len(t)

i = s.find(t)

if i != -1 and t_len == 1:
    print(-1)
    exit()

ans = 0

while i != -1:
    ans += 1
    i = s.find(t, i+t_len-1)

print(ans)