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

using ll = long long;
#define rep(i, n) for(int i = 0; i < n; i++)

int main() {
	int N;
	cin >> N;
	string t = "NUPC";
	int l = 1 << 4;
	vector<string> vs;
	rep(mask, l) {
		string s, ss;
		rep(i, 8) {
			int j = i / 2;
			if(i % 2) {
				if(mask >> j & 1) s += '1';
				else s += '2';
			}
			else s += t[j]; 
		}
		rep(i, 8) {
			if(i % 2) {
				if(s[i] == '2') ss = ss + ss;
			}
			else ss += s[i];
		}
		vs.push_back(ss);
	}
	sort(vs.begin(), vs.end());
	N--;
	cout << vs[N] << endl;
}