<p>Given:</p>

<pre><code>CR = %0d = \r
LF = %0a = \n
</code></pre>

<p>What does</p>

<p>%3E,
%3C </p>

<p>Mean?</p>

They are URL encoded characters.  %3C is <, %3E is >
More info on
URL Encoding
, and
a chart
of some of the lower ASCII values.