<code class="code">b</code>: reads a boolean argument (for backward compatibility; do not use
      in new programs).</li>
<li><code class="code">ld</code>, <code class="code">li</code>, <code class="code">lu</code>, <code class="code">lx</code>, <code class="code">lX</code>, <code class="code">lo</code>: reads an <code class="code">int32</code> argument to
      the format specified by the second letter for regular integers.</li>
<li><code class="code">nd</code>, <code class="code">ni</code>, <code class="