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