#include <iostream>
#include <string>
#include <vector>
using namespace std;
int main(){
	string S;
	cin >> S;
	string T;
	cin >> T;
	int N = S.size();
	int M = T.size();
	vector<int> p;
	for (int i = 0; i <= N - M; i++){
		bool ok = true;
		for (int j = 0; j < M; j++){
			if (S[i + j] != T[j]){
				ok = false;
			}
		}
		if (ok){
			p.push_back(i);
		}
	}
	if (p.empty()){
		cout << 0 << endl;
	} else {
		if (M == 1){
			cout << -1 << endl;
		} else {
			int cnt = p.size();
			int ans = 0;
			int prev = 0;
			for (int i = 0; i < cnt; i++){
				if (prev <= p[i]){
					prev = p[i] + M - 1;
					ans++;
				}
			}
			cout << ans << endl;
		}
	}
}