title: Check if the atom is a lowercase letter
body: <p>I'm doing it like this:</p>
  
  <pre><code>foo(N) :-
          name(N, [Code]),
          name(a, [CodeA]),
          name(z, [CodeZ]),
          CodeA =&lt; Code,
          Code  =&lt; CodeZ.
  </code></pre>
  
  <p>Is there a way that doesn't feel like such a workaroud?</p>