import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int k = sc.nextInt();
		sc.close();

		int n = 4;
		int n2 = 16;
		char[] s = {'N', 'U', 'P', 'C'};
		List<String> list = new ArrayList<>();
		for (int i = 0; i < n2; i++) {
			StringBuilder sb = new StringBuilder();
			for (int j = 0; j < n; j++) {
				sb.append(s[j]);
				if ((i >> j & 1) == 1) {
					sb.append(sb);
				}
			}
			list.add(sb.toString());
		}
		Collections.sort(list);
		System.out.println(list.get(k - 1));
	}
}