import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int k = sc.nextInt();
        List<TreeSet<String>> list = new ArrayList<>();
        list.add(new TreeSet<>());
        list.get(0).add("");
        char[] nupc = "NUPC".toCharArray();
        for (int i = 1; i <= 8; i++) {
            TreeSet<String> current = new TreeSet<>();
            for (String s : list.get(i - 1)) {
                if (i % 2 == 1) {
                    current.add(s + nupc[i / 2]);   
                } else {
                    current.add(s);
                    current.add(s + s);
                }
            }
            list.add(current);
        }
        System.out.println(list.get(8).toArray()[k - 1]);
    }
}
class Scanner {
    BufferedReader br;
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() {
        try {
            br = new BufferedReader(new InputStreamReader(System.in));
        } catch (Exception e) {
            
        }
    }
    
    public int nextInt() {
        return Integer.parseInt(next());
    }
    
    public long nextLong() {
        return Long.parseLong(next());
    }
    
    public double nextDouble() {
        return Double.parseDouble(next());
    }
    
    public String next() {
        try {
            while (!st.hasMoreTokens()) {
                st = new StringTokenizer(br.readLine());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            return st.nextToken();
        }
    }
    
}