#include <bits/stdc++.h>
using namespace std;
 
int main(){
   int A,B,C,a,b,c; char x,y,z,w;
   cin>>A>>x>>B>>y>>C; cin>>a>>z>>b>>w>>c;
   if(a>A){
       cout<<"NO"<<endl;
   }
   else if(A>a){
       cout<<"YES"<<endl;
   }
   else{
       if(b>B){
       cout<<"NO"<<endl;
   }
       else if(B>b){
       cout<<"YES"<<endl;
   }
      else{
          if(c>C){
       cout<<"NO"<<endl;
   }
          else{
              cout<<"YES"<<endl;
          }
      }
   }
}