/* -*- coding: utf-8 -*-
 *
 * 2886.cc:  No.2886 Milk - yukicoder
 */

#include<cstdio>
#include<algorithm>

using namespace std;

/* main */

int main() {
  int d;
  scanf("%d", &d);

  if (d <= 100) puts("Milk");
  else puts("Difficult");

  return 0;
}