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

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