# include<iostream> using namespace std; int main(){ char a[150],b[150],c=0,d=0,i=0; cin>>a>>b; while(a[i]!='\0'){ c++; i++; } while(b[i]!='\0'){ d++; i++; } if(c==d){ cout<<"yes"; } else{ cout<<"no"; } return 0; }