#include<bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef pair<int, int> P;
 
#define mod 1000000007
#define inf 1000000000
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define popcount(x) __builtin_popcountll(x)
 
const long double PI = acos(-1);
 
ll gcd(ll a,ll b){return b ? gcd(b,a%b) : a;}
ll lcm(ll a,ll b){return a / gcd(a,b) * b;}
 
int main(){
  string s, t;
  cin >> s >> t;

  ll tlen = t.size();
  ll ans = 0;
  for(ll i = 0; i < s.size()-tlen + 1; i++){
    string s2 = s.substr(i, tlen);
    //cout << i << endl;
    if(s2 == t && tlen > 1) {
      ans++;
      i += tlen-1;
    }else if(tlen == 1) {
      cout << -1 << endl;
      return 0;
    }
  }
  cout << ans << endl;
  return 0;
}