import java.util.*;
public class Main
{
public static void main(String[] args)
{
Scanner sc=new Scanner(System.in);
if(sc.hasNextInt())
{
System.out.println("Invalid input");
return;

char ch=sc.next().charAt(0);
}
if(ch=='a'||ch=='A'||ch=='e'||ch=='E'||ch=='i'||ch=='I'||ch=='o'||ch=='O'||ch=='u'||ch=='U'){
System.out.println("Vowel");
}
else{
System.out.println("Consonant");
}
}
}