#include<bits/stdc++.h>
using namespace std;

void solve(){
	int n;
	cin>>n;
	if(n<=100)	cout<<"Milk"<<endl;
	else	cout<<"Difficult"<<endl;
}

signed main(){
  ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  //int tt; cin>>tt; while(tt--)
  solve();
}