#include <bits/stdc++.h>
using namespace std;

int N;

string f(string T, int a) {
	if (a == 2) T = T + T;
	return T;
}

int main() {
	cin >> N;
	vector <string> S;
	for (int i = 1; i <= 2; i++) {
		for (int j = 1; j <= 2; j++) {
			for (int k = 1; k <= 2; k++) {
				for (int l = 1; l <= 2; l++) {
					string T = "";
					T += 'N';
					T = f(T, i);
					T += 'U';
					T = f(T, j);
					T += 'P';
					T = f(T, k);
					T += 'C';
					T = f(T, l);
					S.push_back(T);
				}
			}
		}
	}
	sort(S.begin(), S.end());
	cout << S.at(N - 1) << endl;
	return 0;
}