#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;

string S, T;

int main() {
  cin >> S >> T;
  int cnt = 0;
  for (int i = 0; i <= S.size() - T.size(); i++) {
    if (S.substr(i, T.size()) == T) {
      cnt++;
      i += T.size() - 1;
    }
  }
  if (cnt > 0 && T.size() == 1) cout << -1 << endl;
  else cout << cnt << endl;
  return 0;
}