diff -r 178438912e5f -r 50a3b874008a cws/cw04.tex
--- a/cws/cw04.tex	Fri Dec 14 20:01:49 2018 +0000
+++ b/cws/cw04.tex	Sat Dec 15 13:46:54 2018 +0000
@@ -514,7 +514,7 @@
 \end{lstlisting}
 
 \noindent
-where the command \texttt{ldc} loads a constant onto a stack, and \texttt{imul},
+where the command \texttt{ldc} loads a constant onto the stack, and \texttt{imul},
 \texttt{isub} and \texttt{iadd} are commands acting on the stack. Clearly this
 is the arithmetic expression in postfix notation.\bigskip