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