// tok is CNC
static LS ai_splitSplittables_cnc(L<S> tok) {
  MultiMap<S> splits = mechMultiMapCI(ai_language() + " splittables => split");
  for (int i = 1; i < l(tok); i += 2) {
    L<S> l = splits.get(tok.get(i));
    if (nempty(l))
      replaceSubList(tok, i, i+1, ll(first(l))); // For now, take first possibility
  }
  ret tok;
}