#include <stdio.h>
#include <stdbool.h>

bool upordown(int* other)
{
	int x = 0;
	if (!other)
		return upordown(&x);
	else
		return &x > other;
}

int main(void)
{
	printf("%s\n", upordown(NULL) ? "Up" : "Down");

	return 0;
}