he input file <i>prefix_nodes.txt</i> contains the coordinate information
      for the 4-node tet mesh.  Each data line contains the X and
      Y coordinates of a single node.
    </p>

    <p>
      The input file <i>prefix_elements.txt</i> contains the tetrahedron information
      for the 4-node tet mesh.  Each data line contains the indices
      of four nodes that form a tetrahedron.
    </p>

    <p>
      The output file <i>prefix_l2q_nodes.txt</i> contains the coordinate information
      for the 