static WordTokReplacer wordTokReplacerRule_starVars_fromPair_plusSeparatedInOut(PairS p) {
  if (p == null) null;
  LS lA = tok_splitAtPlus(p.a);
  LS out = tok_splitAtPlus(p.b);
  if (l(lA) == 1)
    ret wordTokReplacerRuleOnStarVars(p.a, out);
  if (l(lA) == 2)
    ret wordTokReplacerRuleWithSecondInOnStarVars(first(lA), second(lA), out);
  fail("Too many inputs: " + lA);
}