#include<bits/stdc++.h> using namespace std; int main() { char a[200]={},b[200]={}; int a1=0,b1=0; cin>>a>>b; while(a[a1]!='\0') { a1++; } while(b[b1]!='\0'){ b1++; } if(a1==b1) cout<<"yes"; else cout<<"no"; return 0; }