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

int main(){
    int a1,b1,c1,a2,b2,c2;
    char c;
    cin>>a1>>c>>b1>>c>>c1>>a2>>c>>b2>>c>>c2;
    if(a1>a2){
        cout<<"YES"<<endl;
    }
    else if(a1==a2){
        if(b1>b2){
            cout<<"YES"<<endl;
        }
        else if(b1==b2){
            if(c1>=c2){
                cout<<"YES"<<endl;
            }
            else{
                cout<<"NO"<<endl;
            }
        }
        else{
            cout<<"NO"<<endl;
        }
    }
    else{
        cout<<"NO"<<endl;
    }
}