Prints out numbers who's value is the same as the length of their spelled out form in a given language.

towards.rb

require 'json'
require 'open-uri'

require 'numbers_in_words'
require 'numbers_in_words/duck_punch'

class Numeric
  def to_words language
    if language == 'en'
      self.in_words
    else
      url = "http://translate.google.com/translate_a/t?client=t&tl=#{language}&hl=en&ie=UTF-8&oe=UTF-8&uptl=#{language}&alttl=en&q=#{URI.escape(self.in_words)}"
      json = open(url).read.gsub /,+/, "," # wtf google
      JSON.parse(json).first.first.first
    end
  end
end

language = ARGV.first

100.times { |i| words = i.to_words language; puts words if words.length == i }

$ gem install numbers_in_words
$ ruby towords.rb en
four
$ ruby towords.rb es
cinco
$ ruby towords.rb hr
tri