import java.util.*;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String c = sc.next();
		
		if(c.equals ("a")||c.equals ("i") || c.equals("u")|| c.equals("e") || c.equals("o")) {
			System.out.println("vowel");
		} else {
			System.out.println("consonant");
		} 
		
			 
  	}
}