// editor5
import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        
        if(!sc.hasNextLine()) {
            System.out.println("Invalid input");
            return;
        }
        
         ch = sc.nextLine().charAt(0);
        
        String vowel = "aeiouAEIOU";
        if(vowel.contains(ch+"")) {
            System.out.println("Vowel");
        } else if(!vowel.contains(ch+"")) {
            System.out.println("Consonant");
        } else {
            System.out.println("Invalid input");
        }
        
    }
}