import java.util.Scanner;

public class Wood {
	public static void main(String Args[]) {
		System.out.println("Enter a letter: ");
		Scanner kb = new Scanner(System.in);
		String x;
		do {
			x = kb.nextLine().toLowerCase();
		} while(x.length() != 1);

		if(Character.isAlphabetic(x.charAt(0))) {
			if(x.charAt(0) == 'a') {
				System.out.println(x + " is a vowel!");
			} else if (x.charAt(0) == 'e') {
				System.out.println(x + " is a vowel!");
			} else if (x.charAt(0) == 'i') {
				System.out.println(x + " is a vowel!");
			} else if (x.charAt(0) == 'o') {
				System.out.println(x + " is a vowel!");
			} else if (x.charAt(0) == 'u') {
				System.out.println(x + " is a vowel!");
			} else {
				System.out.println(x + " is a consonant!");
			}
		} else {
			System.out.println(x + " is an invalid input!");
		}
		kb.close();
	}
}