n><code><font color="#000000"><font color="#800000"><i></i></font></font></code><code><font color="#000000"><font color="#800000"><i></i></font></font><i></i></code></pre>
<p>
<pre><code><span class=comment>    </span><span class=identifier>a </span><span class=special>= </span><span class=identifier>ch_p</span><span class=special>(</span><span class=literal>'a'</span><span class=special>),
    </span><span class=identifier>b </span><span class=special>= </span><span class=identifier>ch_p</span><span class=