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



void solve() {
	int d;cin>>d;
	if(d<=100) cout<<"Milk";
	else cout<<"Difficult";
}
 
int main() {
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	int _;_=1;
	while(_--) solve();
	return 0;
}