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