#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("YES");}else{puts("NO");}
#define MAX_N 200005

int main() {
    string s, t;
    cin >> s >> t;
    int n = s.size();
    int m = t.size();

    if(m == 1){
        int flag = 0;
        rep(i,n){
            if(s[i] == t[0]){
                cout << -1 << endl;
                return 0;
            }
        }
    }

    int ans = 0;
    rep(i,n){
        if(i + m - 1 >= n)break;
        string u = s.substr(i,m);
        if(t == u){
            ans++;
            i = i + m - 2;
        }
    }
    cout << ans << endl;
    return 0;
}