diff -r b64e876832cc -r 68d664c204d2 hw07.tex
--- a/hw07.tex	Sun Nov 11 17:28:11 2012 +0000
+++ b/hw07.tex	Wed Nov 14 00:02:38 2012 +0000
@@ -57,7 +57,14 @@
 \texttt{The trainer trains the student team}
 \end{center}
 
+\item {\bf (Optional)} The task is to match strings where the letters are in alphabetical order---for example, 
+\texttt{abcfjz} would pass, but \texttt{acb} would not. Whitespace should be ignored---for example
+\texttt{ab c d} should pass. The point is to try to get the regular expression as short as possible!
+See:
 
+\begin{center}
+\url{http://callumacrae.github.com/regex-tuesday/challenge11.html}
+\end{center}
 \end{enumerate}
 
 \end{document}