题解 | #牛牛的金币#

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        //牛牛的坐标
        int x = scan.nextInt();
        int y = scan.nextInt();
        //金币的坐标
        int x1 = scan.nextInt();
        int y1 = scan.nextInt();
        Coor coor = new Coor();
        coor.c(x, y, x1, y1);
    }
}
class Coor {
    public void c(int x,int y,int x1,int y1) {
        if(x == x1 && y1 - 1 == y) {
            System.out.println("u");
        } else if(x == x1 && y - 1 == y1) {
            System.out.println("d");
        } else if(x1 - 1 == x && y1 == y) {
            System.out.println("r");
        } else if(x - 1 == x1 && y1 == y) {
            System.out.println("l");
        }
        
    }
}