require 'java'

include_class 'java.awt.Robot'

class String
  def to_a
    array = []
    self.each_char { |letter| array << letter }
    return array
  end

  def permutations range
    array = []
    range.each do |i|
      self.to_a.combination(i).to_a.each do |j|
        j.permutation.to_a.each { |k| array << k.join }
      end
    end
    array
  end
end

robo = Robot.new
robo.delay 10
@enter_key = 10

print "Enter your six letters: "
letters = gets.gsub("\n", "").upcase
puts "Letters will begin sending in three seconds. Click the game screen."
sleep 3.0
letters.permutations(3..5).each do |word|
  word.each_char do |letter|
    robo.keyPress(letter.sum)
    robo.keyRelease(letter.sum)
  end
  robo.keyPress @enter_key
  robo.keyRelease @enter_key
end