   <li>
          Nested DO I, K, J loops;
        </li>
        <li>
          Nested DO J, I, K loops;
        </li>
        <li>
          Nested DO J, K, I loops;
        </li>
        <li>
          Nested DO K, I, J loops;
        </li>
        <li>
          Nested DO K, J, I loops;
        </li>
      </ul>
    </p>

    <p>
      The user is allowed to specify N1, N2, and N3, which define
      the matrix sizes.
    </p>

    <h3 align = "center">
      Usage:
    </h3>

    <p>
      <blockquote>
