sS combineToNLPattern_tryToIncludePunctuation(S a, S b) {
  S s = combineToNLPatternIncludingPunctuation(a, b);
  if (s != null) ret s;
  ret combineToNLPattern(a, b);
}

sS combineToNLPattern_tryToIncludePunctuation(Iterable<S> l) {
  ret foldl_noSeed(func(S a, S b) -> S { combineToNLPattern_tryToIncludePunctuation(a, b) }, l);
}