import java.util.Scanner;

public class LabProgram $\{$

public static void main$($String$[]$ args$)\{$

Scanner scanner $=$ new Scanner$($

System.in$)$;

String firstName $=$ scanner $.$ next $()$ ;

String lastName $=$ scanner. next$()$;

String middleName $=$ scanner $.$ hasNext$()?$ scanner.next$()$ : $""$;

if $(!$middleName.isEmpty$()$ && middleName. $).$ length$()==0$

$\}$

middleName $=""$;

String output $=$ lastName $+,+$ firstName $*$ charAt $()+.$