import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s0 = sc.nextLine();
        String [] arr0 = s0.split("\\.");
        int A0 = Integer.parseInt(arr0[0]);
        int B0 = Integer.parseInt(arr0[1]);
        int C0 = Integer.parseInt(arr0[2]);
        String s1 = sc.nextLine();
        String [] arr1 = s1.split("\\.");
        int A1 = Integer.parseInt(arr1[0]);
        int B1 = Integer.parseInt(arr1[1]);
        int C1 = Integer.parseInt(arr1[2]);
        
        if(A1>A0){
            System.out.println("NO");
        }else if(A1<A0){
            System.out.println("YES");
        }else{
            if(B1>B0){
                System.out.println("NO");
            }else if(B1<B0){
                System.out.println("YES");
            }else{
                if(C1>C0){
                    System.out.println("NO");
                }else if(C1<=C0){
                    System.out.println("YES");
                }
            }
        }
    }
}