diff -r bc3980949af2 -r d1046d9d3213 cws/main_cw04.tex
--- a/cws/main_cw04.tex	Sun Nov 08 13:09:38 2020 +0000
+++ b/cws/main_cw04.tex	Mon Nov 09 14:34:12 2020 +0000
@@ -18,7 +18,7 @@
 
 \mbox{}\\[-18mm]\mbox{}
 
-\section*{Preliminary and Core Part 9 (Scala, 4 + 6 Marks)}
+\section*{Preliminary and Main Part 4 (Scala, 4 + 6 Marks)}
 
 \mbox{}\hfill\textit{``The problem with object-oriented languages is they’ve got all this implicit,}\\
 \mbox{}\hfill\textit{environment that they carry around with them. You wanted a banana but}\\
@@ -206,7 +206,7 @@
 
 
 \noindent
-\textbf{Core Part} a useful list function: \texttt{.sortBy} sorts a list
+\textbf{Main Part} a useful list function: \texttt{.sortBy} sorts a list
 according to a component given by the function; a function can be
 tested to be tail-recursive by annotation \texttt{@tailrec}, which is
 made available by importing \texttt{scala.annotation.tailrec}.\medskip