[Char = String] CH2NUM
L(chars) ‘abc def ghi jkl mno pqrs tuv wxyz’.split(‘ ’)
   V num = L.index + 2
   L(ch) chars
      CH2NUM[ch] = String(num)

F mapnum2words(words)
   DefaultDict[String, [String]] number2words
   V reject = 0
   L(word) words
      X.try
         number2words[word.map(ch -> :CH2NUM[ch]).join(‘’)].append(word)
      X.catch KeyError
         reject++
   R (number2words, reject)

V words = File(‘unixdict.txt’).read().rtrim("\n").split("\n")
print(‘Read #. words from 'unixdict.txt'’.format(words.len))
V wordset = Set(words)
V (num2words, reject) = mapnum2words(words)

F interactiveconversions()
   L(inp) (‘rosetta’, ‘code’, ‘2468’, ‘3579’)
      print("\nType a number or a word to get the translation and textonyms: "inp)
      I all(inp.map(ch -> ch C ‘23456789’))
         I inp C :num2words
            print(‘  Number #. has the following textonyms in the dictionary: #.’.format(inp, (:num2words[inp]).join(‘, ’)))
         E
            print(‘  Number #. has no textonyms in the dictionary.’.format(inp))
      E I all(inp.map(ch -> ch C :CH2NUM))
         V num = inp.map(ch -> :CH2NUM[ch]).join(‘’)
         print(‘  Word #. is#. in the dictionary and is number #. with textonyms: #.’.format(inp, (I inp C :wordset {‘’} E ‘n't’), num, (:num2words[num]).join(‘, ’)))
      E
         print(‘  I don't understand '#.'’.format(inp))

V morethan1word = sum(num2words.keys().filter(w -> :num2words[w].len > 1).map(w -> 1))
V maxwordpernum = max(num2words.values().map(values -> values.len))
print(‘
There are #. words in #. which can be represented by the Textonyms mapping.
They require #. digit combinations to represent them.
#. digit combinations represent Textonyms.’.format(words.len - reject, ‘'unixdict.txt'’, num2words.len, morethan1word))

print("\nThe numbers mapping to the most words map to #. words each:".format(maxwordpernum))
V maxwpn = sorted(num2words.filter((key, val) -> val.len == :maxwordpernum))
L(num, wrds) maxwpn
   print(‘  #. maps to: #.’.format(num, wrds.join(‘, ’)))

interactiveconversions()