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");
}
}