diff -r de59aa20a1dc -r ffce7b61b446 main_testing4/knight_test1.scala
--- a/main_testing4/knight_test1.scala	Mon Nov 08 01:16:13 2021 +0000
+++ b/main_testing4/knight_test1.scala	Mon Nov 08 01:39:00 2021 +0000
@@ -1,4 +1,4 @@
-import CW9a._
+import M4a._
 
 assert(is_legal(8, Nil, (3, 4)) == true)
 assert(is_legal(8, List((4, 1), (1, 0)), (4, 1)) == false)