#include <bits/stdc++.h>
using namespace std;

int main() {
  string S, T;
  cin >> S >> T;
  if (T.size() == 1 && (int)S.find(T) != -1) return cout << -1 << "\n", 0;
  int ans = 0, t = T.size();
  while ((int)S.find(T) > -1) S.insert(S.find(T) + t - 1, "."), ans++;
  cout << ans << "\n";
}