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

int main() {
    string S, T;
    cin >> S >> T;

    int ans = 0;
    if (T.size() == 1) {
        rep(i, S.size()) {
            if (S[i] == T[0])
                ans++;
        }
    } else {
        rep(i, S.size()) {
            if (strncmp(&S[i], &T[0], T.size()) == 0) {
                ans++;
                i += T.size() - 2;
            }
        }
    }

    if (T.size() == 1 && ans > 0)
        ans = -1;

    cout << ans << endl;

    return 0;
}