diff -r 5c9de27a5b30 -r c498cb53a9a8 handouts/ho03.tex
--- a/handouts/ho03.tex	Mon Jun 19 10:44:28 2017 +0100
+++ b/handouts/ho03.tex	Wed Jun 28 12:46:23 2017 +0100
@@ -186,7 +186,8 @@
 \end{lstlisting}}  
 
 \noindent I let you think what the corresponding DFA looks like in the
-graph notation.
+graph notation. Also, I suggest you to tinker with the Scala code in
+order to define the DFA that does not accept any string at all. 
 
 Finally, I let you ponder whether this is a good implementation of
 DFAs or not. In doing so I hope you notice that the $\varSigma$ and