ABBLE</b> returns the Scrabble index of a character.
        </li>
        <li>
          <b>CH_UNIFORM</b> returns a scaled pseudorandom CH.
        </li>
        <li>
          <b>DIGIT_BIN_TO_CH</b> returns the character representation of a binary digit.
        </li>
        <li>
          <b>DIGIT_INC</b> increments a decimal digit.
        </li>
        <li>
          <b>DIGIT_OCT_TO_CH</b> returns the character representation of an octal digit.
        </li>
        <li>
          <b>DIGIT_TO_CH</b> 