F shortest_abbreviation_length(line, list_size)
   V words = line.split(‘ ’)
   V word_count = words.len
   I word_count != list_size
      X.throw ValueError(‘Not enough entries, expected #. found #.’.format(list_size, word_count))

   V abbreviation_length = 1
   L
      V abbreviations = Set(words.map(word -> word[0 .< @abbreviation_length]))
      I abbreviations.len == list_size
         R abbreviation_length
      abbreviation_length++

F automatic_abbreviations(filename, words_per_line)
   L(line) File(filename).read().split("\n")
      I line.len > 0
         V length = shortest_abbreviation_length(line, words_per_line)
         print(‘#2 #.’.format(length, line))
      E
         print()

automatic_abbreviations(‘daysOfWeek.txt’, 7)