import java.util.*;
public class Kaseki {
	public static void main(String[] arg){
		Scanner sc = new Scanner(System.in);
		int flag=0;
		String in;
		String[] a = sc.next().split("\\.");
		String[] b = sc.next().split("\\.");
		for(int i = 0;i<3;i++){
			if(Integer.parseInt(a[i])< Integer.parseInt(b[i])){
				flag=1;
				break;
			}else if(Integer.parseInt(a[i])== Integer.parseInt(b[i])){
				continue;
			}else{
				flag = 0;
				break;
			}
		}
		if(flag == 0){
			System.out.println("YES");
		}else{
			System.out.println("NO");
		}
	}
}