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