"r"></span></p>
    <p class="pln"><span class="n"><a id="t15" href="#t15">15</a></span><span class="t">        <span class="str">"(7,8)"</span><span class="op">,</span>&nbsp;</span><span class="r"></span></p>
    <p class="pln"><span class="n"><a id="t16" href="#t16">16</a></span><span class="t">    <span class="op">]</span>&nbsp;</span><span class="r"></span></p>
    <p class="run"><span class="n"><a id="t17" href="#t17">17</a></span><span class="t">    <span class="key">assert</span> <span class="nam">co