keys because two tuples with the same contents are
considered equal:
</p>
<pre class="mendoza-codeblock"><code data-language="janet">(<span class="mdzsyn-coresym">def</span> <span class="mdzsyn-symbol">points</span> @{[<span class="mdzsyn-number">0</span> <span class="mdzsyn-number">0</span>] <span class="mdzsyn-string">"A"</span>
              [<span class="mdzsyn-number">1</span> <span class="mdzsyn-number">3</span>] <span class="mdzsyn-string">"B"</span>
              [<span class="mdzsyn-number">7</span