import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

s = readline().decode().strip()
t = readline().decode().strip()

if (len(t) == 1 and s.count(t) > 0):
    print(-1)
    exit()

ans = 0
while True:
    pos = s.find(t)
    if pos == -1:
        break
    ans += 1
    s = s[pos + len(t) - 1:]
print(ans)