#include <bits/stdc++.h>
using namespace std;
using lint = long long;
using pint = pair<int, int>;
using vi = vector<int>;
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define all(v) v.begin(), v.end()
#define endl "\n"

constexpr int MOD = 1000000007;
const int INF = 1 << 30;

int main() {
    string s, t;
    cin >> s >> t;

    int n = s.size();
    int tn = t.size();

    int c = 0;

    while (s.find(t) != string::npos) {
        c++;
        auto p = s.find(t);
        p += tn - 1;
        s.insert(p, ".");

        if (tn == 1 && c > 5 * n) {
            cout << "-1" << endl;
            exit(0);
        }
    }

    cout << c << endl;

    return 0;
}