#include <iostream>
#include <stdio.h>
using namespace std;
int main(int argc, char* argv[])
{
	int A0,B0,C0;
	int A1,B1,C1;
	fscanf(stdin,"%d.%d.%d",&A0,&B0,&C0);
	fscanf(stdin,"%d.%d.%d",&A1,&B1,&C1);

	if (A0>=A1&&B0>=B1&&C0>=C1){
		cout<<"YES"<<endl;
	}else{
		cout<<"NO"<<endl;
	}
	return 0;
}