--- a/style.sty	Sat Sep 23 14:19:09 2017 +0100
+++ b/style.sty	Sat Sep 23 19:32:21 2017 +0100
@@ -43,7 +43,7 @@
 \newcommand{\HEADER}{{\bf Please submit your solutions to the
 email address 7ccsmsen at gmail dot com. Please submit only one
 homework per email. Please also submit only
-ASCII text or PDFs. Every solution should be preceded by the
+ASCII text or PDFs (no .docs etc). Every solution should be preceded by the
 corresponding question, like:
 
 \begin{center}
@@ -56,7 +56,7 @@
 \end{center}
 
 \noindent Solutions will only be accepted until
-20th December!}\bigskip}
+20th December! Submit with your partner a \underline{single} solution!}\bigskip}
 
 \newcommand{\POSTSCRIPT}{
 {\bf (Optional)} This question is for you to provide