import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
class Ideone
{
	static int kills = 10;
	public static void main (String[] args) throws java.lang.Exception
	{
		System.out.println("Kill count command: ~killc [username]");
	    Scanner userInt = new Scanner(System.in);
	    String regex = "^~killc\\h+(\\S+(?:\\h+\\S+)*)$";
	    String userInput = userInt.nextLine();
 
	    Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(userInput);
 
        if (matcher.find()) {
		    for (String username : matcher.group(1).split(" "))
				System.out.printf("%s has " + kills + " kills.\n",username);
        }
	}
}

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fmtpbGxjIHRlc3QxIHRlc3Qy

~killc test1 test2