【C】#牛牛的金币#

#include <stdio.h>

int main() {
    int x, y, x1, y1;
    scanf("%d %d %d %d", &x, &y, &x1, &y1);
    if(x1 == x && y1 == y + 1)
        printf("u");
    else if(x1 == x && y1 == y - 1)
        printf("d");
    else if(x1 == x + 1 && y1 == y)
        printf("r");
    else if(x1 == x - 1 && y1 == y)
        printf("l");
    return 0;
}