#include "bits/stdc++.h"
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;

using ll = long long;
const ll MOD = 1e9 + 7;

int main() {
    string S, T;
    cin >> S >> T;
    if (T.size() == 1) {
        rep(i, S.size()) {
            if (S[i] == T[0]) {
                cout << "-1\n";
                return 0;
            }
        }
        cout << "0\n";
        return 0;
    }
    int ans = 0;
    rep(i, S.size() - T.size() + 1) {
        if (S.substr(i, T.size()) == T) {
            ans++;
            i = i + T.size() - 2;
        }
    }
    cout << ans << endl;
}