--- a/hws/hw06.tex	Sat Oct 22 13:11:33 2016 +0100
+++ b/hws/hw06.tex	Sat Oct 22 15:18:11 2016 +0100
@@ -57,7 +57,15 @@
 and (ii) give a sample string involving all rules given in 1.-4.~that 
 can be parsed by this grammar.
 
+\item Given the regular expression
 
+\[(ab + a)\cdot (\ONE + b)\]
+
+there are two values for how this regular expression can recognise
+the string $ab$. Give both values and indicate which one is the
+POSIX value.
+
+\item \POSTSCRIPT        
 \end{enumerate}
 
 \end{document}