static S formatXYZ(S pattern, L<S> args) {
  L<S> tok = javaTok(pattern);
  for (int i = 1; i < l(tok); i += 2) {
    S t = tok.get(i);
    if (l(t) == 1 && eqOneOf(t, "X", "Y", "Z")) {
      int idx = charDiff(t.charAt(0), 'X');
      if (l(args) > idx)
        tok.set(i, args.get(idx));
    }
  }
  ret join(tok);
}

static S formatXYZ(S pattern, S... args) {
  ret formatXYZ(pattern, asList(args));
}