DAN

#include<bits/stdc++.h> 

using namespace std; 

int main() { 
int s1=0,s2=0; 
string a,b; 
cin>>a>>b; 
while (a[s1]!='\0'){ 
 s1++; 
} 
while (b[s2]!='\0'){ 
 s2++; 
} 
if(s1==s2){ 
 cout<<"yes"; 
}else{ 
 cout<<"no"; 
} 
return 0; 
}