#include <bits/stdc++.h>




namespace zawa {

using i16 = std::int16_t;
using i32 = std::int32_t;
using i64 = std::int64_t;
using i128 = __int128_t;

using u8 = std::uint8_t;
using u16 = std::uint16_t;
using u32 = std::uint32_t;
using u64 = std::uint64_t;

using usize = std::size_t;

} // namespace zawa


namespace zawa {

void SetFastIO() {
    std::cin.tie(nullptr)->sync_with_stdio(false);
}

void SetPrecision(u32 dig) {
    std::cout << std::fixed << std::setprecision(dig);
}

} // namespace zawa
using namespace zawa;

int main() {
    SetFastIO();

    std::vector<std::string> s;
    std::string tar{"NUPC"};
    for (int bit{} ; bit < (1 << 4) ; bit++) {
        std::string t;
        for (int i{} ; i < 4 ; i++) {
            t += tar[i];
            if (bit & (1 << i)) {
                t = t + t;
            }
        }
        s.push_back(t);
    }
    std::sort(s.begin(), s.end());
    int k; std::cin >> k;
    std::cout << s[k - 1] << '\n';
}