#---
# Excerpted from "Programming Ruby 3.2",
# published by The Pragmatic Bookshelf.
# Copyrights apply to this code. It may not be used to create training material,
# courses, books, articles, and the like. Contact us if you are in doubt.
# We make no guarantees that this code is fit for any purpose.
# Visit https://pragprog.com/titles/ruby5 for more book information.
#---
word_list = File.open("wordlist")
catch(:done) do
  result = []
  while (line = word_list.gets)
    word = line.chomp
    throw :done unless /^\w+$/.match?(word)
    result << word
  end
  puts result.reverse
end