#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (n); i++)
#define ALL(v) (v).begin(), (v).end()
using ll = long long;
using P = pair<int, int>;
const int INF = 1e9;
const long long LINF = 1e18;
const long long MOD = 1e9 + 7;

signed main() {
    string s, t;
    cin >> s;
    cin >> t;
    int n = s.size(), m = t.size();
    if (t.size() == 1) {
        rep(i, n) {
            if (s[i] == t[0]) {
                cout << -1 << endl;
                return 0;
            }
        }
        cout << 0 << endl;
        return 0;
    }
    int ans = 0;
    rep(i, n) {
        if (s.substr(i, m) == t) {
            ans++;
            i += m - 2;
        }
    }
    cout << ans << endl;
    return 0;
}