sS alphaBravoSpell(S s) {
  new StringBuilder buf;
  for (char c : characters(s)) {
    char u = upper(c);
    if (u >= 'A' && u <= 'Z')
      buf.append(alphaBravoAlphabet().get(charDiff(u, 'A'))).append(' ');
    else
      buf.append(c);
  }
  ret str(buf);
}