LETTER_SYMBOLS = ('a'..'z').to_a + ('A'..'Z').to_a

class English < Engine
  def initialize
    @word = ''
    super
  end
  
  def process(char)
    match = false
    word = nil
    
    if LETTER_SYMBOLS.include?(char)
      @word << char
      match = true
    else
      word = @word
      @word = ''
      match = false
    end
    
    [match, word]
  end  
end