diff -r e9d14d58be3c -r daf561a83ba6 main_marking4/knight1_test4.scala
--- a/main_marking4/knight1_test4.scala	Thu Jan 13 12:55:03 2022 +0000
+++ b/main_marking4/knight1_test4.scala	Mon Apr 11 23:55:27 2022 +0100
@@ -1,4 +1,4 @@
-import CW9a._
+import M4a._
 
 
 val f_urban = (x:(Int, Int)) => if (x._1 > 3) Some(List(x)) else None