diff -r f9fdd9010d04 -r 5412e0952fdb bsc-projects-18.html
--- a/bsc-projects-18.html	Mon Sep 24 10:19:46 2018 +0100
+++ b/bsc-projects-18.html	Mon Sep 24 10:24:11 2018 +0100
@@ -81,7 +81,7 @@
   Python and Ruby need approximately 30 seconds of hard work for matching this string. You can try it for yourself:
   <A HREF="http://talisker.inf.kcl.ac.uk/cgi-bin/repos.cgi/afl-material/raw-file/tip/progs/catastrophic.py">catastrophic.py</A> (Python version) and 
   <A HREF="http://talisker.inf.kcl.ac.uk/cgi-bin/repos.cgi/afl-material/raw-file/tip/progs/catastrophic.rb">catastrophic.rb</A> 
-  (Ruby version). Here is a similar problem in Java: <A HREF="http://talisker.inf.kcl.ac.uk/cgi-bin/repos.cgi/afl-material/raw-file/tip/progs/catastrophic.rb">catastrophic.java</A> 
+  (Ruby version). Here is a similar problem in Java: <A HREF="http://talisker.inf.kcl.ac.uk/cgi-bin/repos.cgi/afl-material/raw-file/tip/progs/catastrophic.java">catastrophic.java</A> 
   </p> 
 
   <p>