S = list(str(input()))
T = str(input())
N = len(S)
lenT = len(T)

if lenT == 1 and T in S:
  print(-1)
else:
  n = 0
  ans = 0
  for i in range(N+lenT):
    if T == "".join(S[i:i+lenT]):
      S.insert(i+lenT-1,".")
      ans += 1
      n += 1
    if i == N+n-1:
      break
  print(ans)