<ul>
  <li>html</li>
  <li id="idsel" class="classsel">css</li>
  <li>javascript</li>
</ul>
<ol>
  <li>style attribute</li>
  <li>id selector</li>
  <li>class selector</li>
  <li>tag selector</li>
</ol>
li{color:red;}
#idsel{color:blue;}
#idsel{color:yellow;}
.classsel{color:green;}
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