#include <iostream>
#include <string>
#include <cstring>
#include <utility>
#include <algorithm>
#include <map>
#include <set>
#include <vector>
#include <cmath>
#include <cstdlib>
#include <queue>
#include <stack>
#include <iomanip>
#include <fstream>
#include <unordered_set>
#include <unordered_map>

using namespace std;

#define REP(i, n) for(ll i = 0;i < n;i++)
#define REPR(i, n) for(ll i = n;i >= 0;i--)
#define FOR(i, m, n) for(ll i = m;i < n;i++)
#define FORR(i, m, n) for(ll i = m;i >= n;i--)
#define REPO(i, n) for(ll i = 1;i <= n;i++)
#define ll long long
#define INF (ll)1ll << 60
#define MINF (-1 * INF)
#define ALL(n) n.begin(),n.end()
#define MOD 1000000007
#define P pair<ll, ll>

ll ans = 0;
int main() {
	string s, t;
	cin >> s >> t;
	ll n = s.size(), m = t.size();
	REP(i, n - m + 1) {
		bool ok = true;
		REP(j, m) {
			if (s[i + j] != t[j])ok = false;
		}
		if (ok) {
			if (m == 1) {
				cout << -1 << endl;
				return 0;
			}
			s[i + m - 2] = '.';
			ans++;
		}
	}
	cout << ans << endl;
}