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

#define rep(i, s, n) for (int i = (int)(s); i < (int)(n); i++)
#define rrep(i, s, n) for (int i = (int)(n)-1; i >= (int)(s); i--)

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	

	int d; cin >> d;
	if (d <= 100) cout << "Milk\n";
	else cout << "Difficult\n";
}