static L<PairS> ai_sortMatchPairs(L<PairS> l) {
  l = mapPairA(func(S s) -> S { replaceSuffix(">", "0>", s) }, l);
  l = pairsSortedByAComparator(alphaNumComparator(), l);
  //l = pairsSortedByA(l);
  l = mapPairA(func(S s) -> S { replaceSuffix("0>", ">", s) }, l);
  ret l;
}