音节判断

import java.util.*;

public class 音节判断 {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		List<String> b = new ArrayList<String>();
		String[] t = new String[] { "false", "true", "false", "true" };
		char[] a = sc.next().toCharArray();
		for (int i = 0; i < a.length; i++) {
			String c = String.valueOf(isyuanyin(a[i]));
			if (i > 1) {
				if (c == b.get(b.size() - 1)) {
					continue;
				} else {
					b.add(c);
				}
			} else {
				b.add(c);
			}
		}
		boolean flag = true;
		for (int i = 0; i < b.size(); i++) {
			if (t[i] != b.get(i)) {
				flag = false;
				break;
			}
		}
		if (b.size() < 4) {
			System.out.println("no");
		} else {
			if (flag) {
				System.out.println("yes");
			} else {
				System.out.println("no");
			}
		}
	}

	// 判断是否是元音
	public static boolean isyuanyin(char i) {
		char[] b = { 'a', 'e', 'i', 'o', 'u' };
		boolean result = false;
		for (int j = 0; j < b.length; j++) {
			if (i == b[j]) {
				result = true;
				break;
			}
		}
		return result;
	}
}