--- a/cws/cw02.tex	Tue Jan 22 12:53:05 2019 +0000
+++ b/cws/cw02.tex	Mon Jan 28 12:49:19 2019 +0000
@@ -234,8 +234,8 @@
 \begin{itemize}
 \item[(3)] Implement a kind of grouping function that calculates a Map
   containing the userIDs and all the corresponding recommendations for
-  this user (list of movieIDs). This should be implemented in a tail
-  recursive fashion using a Map as accumulator. This Map is set to
+  this user (list of movieIDs). This should be implemented in a
+  tail-recursive fashion using a Map as accumulator. This Map is set to
   \pcode{Map()} at the beginning of the calculation. For example
 
 \begin{lstlisting}[numbers=none]