#include <bits/stdc++.h>
using namespace std;
typedef signed long long ll;

#undef _P
#define _P(...) (void)printf(__VA_ARGS__)
#define FOR(x,to) for(x=0;x<(to);x++)
#define FORR(x,arr) for(auto& x:arr)
#define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++)
#define ALL(a) (a.begin()),(a.end())
#define ZERO(a) memset(a,0,sizeof(a))
#define MINUS(a) memset(a,0xff,sizeof(a))
//-------------------------------------------------------


string S,T;

void solve() {
	int i,j,k,l,r,x,y; string s;
	
	cin>>S>>T;
	int ret=0;
	while(1) {
		int ng=0;
		FOR(i,(int)S.size()-(int)T.size()+1) {
			if(S.substr(i,T.size())==T) {
				ng++;
				ret++;
				S=S.substr(i+T.size()-1);
				if(T.size()==1) return _P("-1\n");
				break;
			}
		}
		if(ng==0) break;
	}
	cout<<ret<<endl;
}


int main(int argc,char** argv){
	string s;int i;
	if(argc==1) ios::sync_with_stdio(false), cin.tie(0);
	FOR(i,argc-1) s+=argv[i+1],s+='\n'; FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
	cout.tie(0); solve(); return 0;
}