#include<bits/stdc++.h>
using namespace std;
using i64 = long long;
using u64 = unsigned long long;
using u32 = unsigned;

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


signed main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    solve();
    return 0;
}