ass="nam">print</span><span class="op">(</span><span class="fst">f"</span><span class="fst">After removing duplicates, we have </span><span class="op">{</span><span class="nam">len</span><span class="op">(</span><span class="nam">dataset</span><span class="op">)</span><span class="op">}</span><span class="fst"> mazes</span><span class="fst">"</span><span class="op">)</span>&nbsp;</span><span class="r"></span></p>
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