keokent

class String
  def shuffle
    self.split("").shuffle.join
  end
end

p "foobar".shuffle

keokent

def string_shuffle(s)
  s.split("").shuffle.join
end

p string_shuffle("foobar")

keokent

import java.util.ArrayList;
import java.util.Collections;

public class Sekigae{
    public static void main(String[] args){

  ArrayList<String> list = new ArrayList<String>();

	list.add("okkun");
	list.add("kitak");