#include <iostream>
using namespace std;
int main() {
int a, b, c, d;
cin >> a >> b >> c >> d;
if (((a <= b) && (b <= c) && (c <= d)) && !((a == b) && (b == c) && (c == d))) {
cout << "Crescator";
}
if (((a >= b) && (b >= c) && (c >= d)) && !((a == b) && (b == c) && (c == d))) {
cout << "Descrescator";
}
if (!((a <= b) && (b <= c) && (c <= d))) {
if (!((a >= b) && (b >= c) && (c >= d))) {
cout << "Nemonoton";
}
}
if ((a == b) && (b == c) && (c == d)){
cout << "Nemonoton";
}
return 0;
}
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