hat the images are sorted wrt to arrival time&#39;</span><span class="p">)</span>
        <span class="nb">print</span><span class="p">(</span><span class="s1">&#39;direct output from &quot;ler&quot; should be sorted&#39;</span><span class="p">)</span>
        <span class="n">dt_12</span><span class="p">,</span> <span class="n">dt_13</span><span class="p">,</span> <span class="n">dt_14</span><span class="p">,</span> <span class="n">dt_23</span><span class="p">,</span> <span class="n">dt_24</span><span class