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#include<bits/stdc++.h>
using namespace std;
string s1,s2;
int main(){
int a=-1;
getline(cin,s1);
getline(cin,s2);
if(s1.find(s2)>=0&&s1.find(s2)<s1.length()){
a=s1.find(s2);
}
if(a!=-1){
cout<<"yes";
}
else{
cout<<"on";
}
return 0;
}