refix</i>_<b>r.txt</b>
        </li>
      </ul>
    </p>

    <p>
      For instance, let us suppose we want to compute a 2D product rule
      formed from a 3 point Clenshaw Curtis rule and a 2 point
      Gauss-Legendre rule.  If the prefixes for these files were
      "cc_d1_o003" and "gl_d1_o002" respectively, then the input
      file to the program would read as follows:
      <pre>
        cc_d1_o003
        gl_d1_o002
      </pre>
      When the program read the first 1D rule, it would be searching