// #pragma GCC optimize("O3,unroll-loops")
#include <bits/stdc++.h>
// #include <x86intrin.h>
using namespace std;
#if __cplusplus >= 202002L
using namespace numbers;
#endif



int main(){
	cin.tie(0)->sync_with_stdio(0);
	cin.exceptions(ios::badbit | ios::failbit);
	vector<string> a;
	for(auto mask = 0; mask < 1 << 4; ++ mask){
		string s;
		for(auto i = 0; i < 8; ++ i){
			if(~i & 1){
				s += "NUPC"[i >> 1];
			}
			else if(mask >> (i >> 1) & 1){
				s += s;
			}
		}
		a.push_back(s);
	}
	ranges::sort(a);
	int k;
	cin >> k;
	cout << a[k - 1] << "\n";
	return 0;
}

/*

*/