#include <iostream>
using namespace std;
int main(){
int a,b,c,d;
cin >> a >> b >> c >> d;
if(a == b && b==c && c==d) cout << "Nemonoton";
if(a <= b && b<=c && c<=d) cout << "Crescator";
else if (a >= b && b>=c && c>=d) cout << "Descrescator";
else cout << "Nemonoton";
}