import java.util.*;
public class ExDod {

    static Scanner reader = new Scanner(System.in);
    public static void main(String[] args)
    {
    boolean check=true;
    String beta="", alpha;
    System.out.println("Enter a sentence");
    alpha = reader.next();
    int p=0;
    for(int i=0; i<p; i=i+p)
    {
        p = alpha.indexOf(" ",p+1);
            if(alpha.charAt(i)!= alpha.charAt(i+p))
                check=false;
            if(check)
                beta = alpha.substring(i, p)+" ";
            check=true;

    }

    System.out.println("Beta");