#include<iostream> using namespace std; int main(){ string a,b,tempstr; cin>>a>>b; int lenb=b.size(),frequency=a.size()-lenb,temp; for(int i=0;i<frequency;){ tempstr="",temp=i+lenb; for(;i<temp;i++) tempstr+=a[i]; if(tempstr==b){ cout<<"yes"; return 0; } i-=lenb-1; } cout<<"no"; return 0; }