      </li>
        <li>
          <a href = "u0006.png">u0006.png</a>,
          the solution U at time step 6;
        </li>
        <li>
          <a href = "u0007.png">u0007.png</a>,
          the solution U at time step 7;
        </li>
        <li>
          <a href = "u0008.png">u0008.png</a>,
          the solution U at time step 8;
        </li>
        <li>
          <a href = "u0009.png">u0009.png</a>,
          the solution U at time step 9;
        </li>
        <li>
          <a href = "u0010.