Given string userName on one line and string lastName on a second line, append a comma to userName. Then, append lastName to userName.

Ex: If the input is:

Felipe

Lee

then the output is:

Felipe, Iee

import java.util.Scanner;

public class concatenatestring $\{$

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

Scanner scnr $=$ new Scanner$($

System.in$)$;

String userName;

String lastName;

userName $=$ scnr$.$ nextline$($