import java.util.*;

public class kap4_selfCheck23{
   public static void main(String[] args){
      Scanner console = new Scanner(System.in);

      System.out.print("Enter your full name: ");
      String name = console.nextLine();

      String[] names = name.split(" ");

      System.out.print(names[1]+", "+names[0].charAt(0));
   }
}