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

const string NUPC="NUPC";

vector<string> nupc(){
	vector<string> v;
	for(int i=0;i<(1<<4);i++){
		string s;
		for(int j=0;j<4;j++){
			s+=NUPC[j];
			if(i&(1<<j)){
				s+=s;
			}
		}
		v.push_back(s);
	}
	sort(v.begin(),v.end());
	return v;
}

int main(){
	int k;
	cin >> k;
	vector<string> v=nupc();
	cout << v[--k] << endl;
	return EXIT_SUCCESS;
}