# In reply to @_timurski "I don't think people": Oh, so you mean something like
# this:
const WORDCHARS = {'a' .. 'z', 'A' .. 'Z', '\''}

func abbreviate(s: string): string =
  var previous = ' '
  for character in s:
    if character in WORDCHARS and previous notin WORDCHARS:
      result &= character.toUpperAscii()
    previous = character
# This can be trivially modified to use an explicit index in the loop, and instead
# of using a set you can compare char with `>` `<` operators.