static ItIt<IntRange> wordIntRangesIterator(LS tok, O... _) {
  boolPar plusFull;
  int n = countTokens(tok);
  ret nestedIterator(
    countIterator_exclusive(0, n), from -> mapI(
      countIterator_inclusive(from+1, from == 0 && !plusFull ? n-1 : n), to ->
        IntRange(from, to)));
}