static L<S> switcheroo_themap = ll(
  "mine", "yours",
  "my", "your",
  "you are", "i am",
  "are you", "am i",
  "for me", "for you",
  "against me", "against you",
  "with me", "with you",
  "without me", "without you",
  "you're", "i'm",
  "you've", "i've",
  "me", "you",
  "i", "you",
);

static S switcheroo(S s) {
  L<S> tok = nlTok5(s);
  for (int i = 1; i < l(tok); i += 2) {
    for (int j = 0; j < l(switcheroo_themap); j += 2) {
      S x = switcheroo_themap.get(j), y = switcheroo_themap.get(j+1);
      L<S> tokx = nlTok5(x), toky = nlTok5(y);
      switcheroo_matchReplace(tok, i, tokx, toky);
      switcheroo_matchReplace(tok, i, toky, tokx);
    }
  }
  ret join(map(f switcheroo_dropAsterisk, tok));
}

sS switcheroo_dropAsterisk(S t) {
  ret startsWith(t, "*") && l(t) > 1 ? substring(t, 1) : t;
}

static void switcheroo_matchReplace(L<S> tok, int i, L<S> tokx, L<S> toky) {
  //printFormat("Matching * * *", i, get(tok, i), tokx);
  if (switcheroo_tokRegionMatch(tok, i, tokx)) {
    //printFormat("Replacing * *", tokx, toky);
    for (int j = 0; j*2+1 < l(tokx); j++)
      tok.set(i+j*2, "*" + toky.get(1+j*2));
  }
}

static bool switcheroo_tokRegionMatch(L<S> tok, int i, L<S> tokx) {
  for (int j = 0; j*2+1 < l(tokx); j++)
    if (!eqic(get(tok, i+j*2), get(tokx, 1+j*2)))
      ret false;
  ret true;
}