import java.util.*;

class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        char a = sc.next().charAt(0);
        if(!sc.hasNextInt()){
            if(a=='a'||a=='e'||a=='i'||a=='o'||a=='u'||a=='A'||a=='E'||a=='I'||a=='O'||a=='U'){
              System.out.println("Vowel");
              return;
            }
            else if(Character.isLetter()){
               System.out.println("Consonant");
            } 
        }else{
            System.out.println("Invalid input");
        }
    }
}