2

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;


public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String s = reader.readLine();
        boolean flag;
        if (isVowel(s.charAt(0))) {
            flag = false;
        }
        else {
            flag = true;
        }
        boolean bigFlag = true;
        for (int i = 1; i < s.length(); ++i) {
            if (!isVowel(s.charAt(i)) && !flag) {
                flag = true;
            }
            else if (isVowel(s.charAt(i)) && flag) {
                flag = false;
            }
            else {
                bigFlag = false;
                break;
            }
        }
        if (!bigFlag) {
            System.out.println("NO");
        }
        else {
            System.out.println("YES");
        }
    }

    public static boolean isVowel(char c) {
        return (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u' || c == 'y');
    }
}