#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ char a[1001],b[1001]; cin>>a; cin>>b; strcmp(a,b); if(strcmp(a,b)!=0){ cout<<"no"; } else{ cout<<"yes"; } return 0; }