#include <bits/stdc++.h>
using namespace std;

int main(){
    string s1;cin>>s1;
    string s2;cin>>s2;
    string a,b;
    if(s1[0]>s2[0]){
        cout<<"YES"<<endl;
    }
    else if(s1[0]==s2[0]){
        if(s1[2]>s2[2]){
            cout<<"YES"<<endl;
        }
        else if(s1[2]==s2[2]){
            if(s1[4]>=s2[4]){
                cout<<"YES"<<endl;
            }
            else{
                cout<<"NO"<<endl;
            }
        }
        else{
            cout<<"NO"<<endl;
        }
    }
    else{
        cout<<"NO"<<endl;
    }
}