#include <bits/stdc++.h> using namespace std; int main(){ string s1,s2; cin>>s1>>s2; if(s1.find(s2)!=string::npos) cout<<s1.find(s2)<<endl; else cout<<-1<<endl; return 0; }

#include<bits/stdc++.h> using namespace std; int main(){ string a,b; cin>>a>>b; if(a.find(b)!=string::npos) cout<<a.find(b); else cout<<-1; return 0; }