#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" << endl;
} else if (((a <= b ) && (b <= c ) && (c <= d)) && ( a != d )){
cout << "Crescator" << endl;
}else if (((a >= b ) && (b >= c ) && ( c >= d)) && ( a != d )){
cout << "Descrescator" << endl;
}else{
cout << "Nemonoton" << endl;
}
return 0;
}
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