span>
<span class="sd">        (used for verification purposes only)</span>

<span class="sd">    Returns</span>
<span class="sd">    -------</span>
<span class="sd">    pandas.DataFrame</span>
<span class="sd">        Mapping table containing assignment of</span>

<span class="sd">        1. index in first sequence (i)</span>
<span class="sd">        2. symbol in first sequence (A_i)</span>
<span class="sd">        3. index in second sequence (j)</span>
<span class="sd">        4. symbol in second sequence