#include <bits/stdc++.h>
#define int long long 
using namespace std;
using Graph = vector<vector<int>>;

signed main(){
  string S, T;
  cin >> S >> T;
  
  int ans = 0;
  int N = (int)T.size();
  int cnt = 0;
  while( cnt < S.size() ){
    if( S.substr(cnt, N) == T ){
      if( N==1 ){
        cout << -1 << endl;
        return 0;
      }else{
        ans++;
        cnt += N-1;
      }
    }
    cnt++;
  }
  cout << ans << endl;
}