#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; }