#include<iostream> #include<cmath> using namespace std; int main() { char a[1001],b[1001]; int sum1=0,sum2=0; cin>>a>>b; while(a[sum1]!='\0'){ sum1++; } while(b[sum2]!='\0'){ sum2++; } if(sum1==sum2){ cout<<"yes"<<endl; } else{ cout<<"no"<<endl; } return 0; }