import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		String[] ary = {"y", "u", "k", "i", "c", "o", "d", "e", "r"};
		
		int num = sc.nextInt();
		while (num != 0) {
			System.out.println(ary[num - 1]);
			num = sc.nextInt();
		}
		
		sc.close();
	}
}