#include <bits/stdc++.h>
using namespace std::literals::string_literals;
using i64 = std::int_fast64_t;
using std::cout;
using std::endl;
using std::cin;

template<typename T>
std::vector<T> make_v(size_t a){return std::vector<T>(a);}

template<typename T,typename... Ts>
auto make_v(size_t a,Ts... ts){
  return std::vector<decltype(make_v<T>(ts...))>(a,make_v<T>(ts...));
}

int main() {
	std::string s, t; cin >> s >> t;
	
	if(t.size() == 1) {
		for(int i = 0; i < s.size(); i++) {
			if(s[i] != t[0]) continue;
			printf("-1\n");
			return 0;
		}
	}
	
	int ans = 0;
	for(int i = 0; i < (int)s.size() - (int)t.size() + 1; i++) {
		if(s.substr(i, t.size()) != t) continue;
		i += (int)t.size() - 2;
		ans++;
	}
	
	printf("%d\n", ans);
	return 0;
}