#include <bits/stdc++.h>
using namespace std;
//#include <atcoder/all>
//using namespace atcoder;
//using mint = modint998244353;

//多倍長整数//
//#include <boost/multiprecision/cpp_int.hpp>
//namespace mp = boost::multiprecision;
//using Bint = mp::cpp_int;

const int INF = 1e9;
const int MOD = 998244353;
const long long LINF = 4e18;

using ll = long long;
using vi = vector<int>;
using vl = vector<long long>;
using vs = vector<string>;
using vc = vector<char>;
using vb = vector<bool>;
using vvi = vector<vector<int>>;
using vvvi = vector<vector<vector<int>>>;
using vvvvi = vector<vector<vector<vector<int>>>>;
using vvl = vector<vector<long long>>;
using vvvl = vector<vector<vector<long long>>>;
using vvvvl = vector<vector<vector<vector<long long>>>>;
using vvc = vector<vector<char>>;
using vvb = vector<vector<bool>>;
using vvvb = vector<vector<vector<bool>>>;
using vvvvb = vector<vector<vector<vector<bool>>>>;

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define dump(x)  cout << #x << " = " << (x) << endl;
#define Yes(n) cout << ((n) ? "Yes" : "No"  ) << endl
#define ALL(obj) (obj).begin(),(obj).end()

int main(){
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	vs ans;
	rep(j,2){
		rep(k,2){
			rep(l,2){
				rep(m,2){
					string a = "";
					a.push_back('N');
					if(j){
						a = a+a;
					}
					a.push_back('U');
					if(k){
						a = a+a;
					}
					a.push_back('P');
					if(l){
						a = a + a;
					}
					a.push_back('C');
					if(m){
						a = a + a;
					}
					ans.push_back(a);
				}
			}
		}
	}
	sort(ALL(ans));
	int k;
	cin >> k;
	cout << ans[k - 1] << endl;
	return 0;
}