import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner (System.in);
        if(!sc.hasNext().CharAt(0)){
            System.out.print("Invalid input");
            return;
        }
        char n = sc.next().charAt(0);
        
         if(n=='a'||n=='e'||n=='i'||n=='o'||n=='u')
        {
            System.out.print("Vowel");
        }else{
            System.out.print("Consonant");
        }
        
            
        
    }
}