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();
        String[] NUPC = {"N", "U", "P", "C"};
        List<String> ans = new ArrayList<>();
        for (int i = 0; i < 16; i++) {
            StringBuilder sb = new StringBuilder();
            for (int j = 0; j < 4; j++) {
                sb.append(NUPC[j]);
                if ((i & (1 << j)) == 0) {
                    sb.append(sb);
                }
            }
            ans.add(sb.toString());
        }
        Collections.sort(ans);
        System.out.println(ans.get(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();
        }
    }
    
}