#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define int ll
void solve(){
	int n;
	cin>>n;
	if(n<=100){
		cout<<"Milk";
	}else{
		cout<<"Difficult";
	}

}
signed main(){
	int t=1;
//	cin>>t;
	for(int a=0;a<t;a++){
		solve();
	}
}