#include<bits/stdc++.h>

using namespace std;
using ll = long long int;
using lc = complex<double>;

int main(void) {
    constexpr ll MOD = 1e9 + 7;
    constexpr double PI = acos(-1);
    cout << fixed << setprecision(32);
    cin.tie(0); ios::sync_with_stdio(false);

    string s,t;
    cin >> s >> t;
    ll n = s.size(), m = t.size();
    if(m == 1) {
        for(auto &c: s)
            if(c == t[0]) {
                cout << -1 << endl;
                return 0;
            }
        cout << 0 << endl;
        return 0;
    }

    ll r = 0;
    for(ll i=0; i<n; i++) {
        ll j;
        for(j=0; j<m && i+j<n; j++)
            if(s[i+j] != t[j]) break;
        if(j == m) {
            i = i+m-1-1;
            r++;
        }
    }
    cout << r << endl;
}