#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(){ int n; char s1[10001],s2[10001]; cin>>s1>>s2; n=strcmp(s1,s2); if(n==0){ cout<<"yes"; } else{ cout<<"no"; } return 0; }