static LS ai_twoLinesToFlexStarPattern_1(S a, S b, O... _) {
  optPar bool verbose;
  LS tokA = javaTokC(a), tokB = javaTokC(b);
  new LS out;
  for i over tokA: {
    S word = tokA.get(i);
    for (int j : indicesOfIC(tokB, word)) {
      if (verbose) print(word + ": " + i + " / " + j);
      S pat1 = (i == 0 ? "" : "* ") + word + (i == l(tokA)-1 ? "" : " *");
      S pat2 = (j == 0 ? "" : "* ") + word + (j == l(tokB)-1 ? "" : " *");
      if (verbose) print(+pat1);
      if (verbose) print(+pat2);
      if (eq(pat1, pat2))
        out.add(pat1);
    }
  }
  ret out;
}