title: riddle - replace 4 strokes of code in equivalent 2
body: <pre><code>tst r0
  blt label
  cmp r0, #11
  bgt label
  </code></pre>
  
  <p>As I understand this peace of code is a brench if r0 &lt; 0 or r0 > 11.</p>
  
  <p>How can I optimize it to only 2 strokes of code.</p>