#include<iostream> using namespace std; char s[152],s1[151]; int main(){ cin>>s>>s1; int sum=0,sum1=0; for(int i=0;s[i]!='\0';i++){ sum++; } for(int i=0;s1[i]!='\0';i++){ sum1++; } if(sum!=sum1){ cout<<"no"; } else{ cout<<"yes"; } }