--- a/cws/cw01.tex	Fri Nov 10 01:02:52 2017 +0000
+++ b/cws/cw01.tex	Fri Nov 10 09:00:46 2017 +0000
@@ -381,9 +381,9 @@
 when compounded, lead to moderately different values.\bigskip
 
 \noindent
-\textbf{Hints:} useful string functions: \texttt{startsWith(...)} for
-testing a string having a given prefix, \texttt{\_ + \_} for
-concatenating twop strings; useful option functions: \texttt{.flatten}
+\textbf{Hints:} useful string functions: \texttt{.startsWith(...)} for
+checking whether a string has a given prefix, \texttt{\_ + \_} for
+concatenating two strings; useful option functions: \texttt{.flatten}
 flattens a list of options such that it filters way all
 \texttt{None}'s, \texttt{Try(...) getOrElse ...} runs some code that
 might raise an exception, if yes, then a default value can be given;