#include <bits/stdc++.h>
using namespace std;
using Int = long long;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}


template<typename T> void drop(const T &x){cout<<x<<endl;exit(0);}

//INSERT ABOVE HERE
signed main(){
  cin.tie(0);
  ios::sync_with_stdio(0);
  string s,t;
  cin>>s>>t;
  if(t.size()==1&&s.find(t)!=string::npos) drop(-1);

  Int cnt=0;
  while(s.find(t)!=string::npos){
    Int k=s.find(t);
    s=s.substr(k+t.size()-1);
    cnt++;
  }
  cout<<cnt<<endl;
  return 0;
}