#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 s1[1001],s2[1001]; cin>>s1>>s2; if(strcmp(s1,s2)==0){ cout<<"yes"; } else cout<<"no"; return 0; }