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

int main()
{
    int N;
    cin >> N;
    vector<string> S;
    vector<char> NUPC = {'N', 'U', 'P', 'C'};
    for (int bit = 0; bit < (1 << 4); bit++)
    {
        string s;
        for (int i = 0; i < 4; i++)
        {
            s += NUPC[i];
            if (bit & (1 << i))
            {
                s += s;
            }
        }
        S.push_back(s);
    }
    sort(S.begin(),S.end());
    cout << S[N - 1];
}