#include<iostream>

using namespace std;

int main(){

	int A0,B0,C0,A1,B1,C1;
	char gav;

	cin>>A0>>gav>>B0>>gav>>C0;
	cin>>A1>>gav>>B1>>gav>>C1;

	if(A0>A1||(A0==A1&&B0>B1)||(A0==A1&&B0==B1&&C0>=C1)) cout<<"YES"<<endl;
	else cout<<"NO"<<endl;
}