--- a/main_marking4/knight1_test3b.scala	Sun Jan 15 10:58:13 2023 +0000
+++ b/main_marking4/knight1_test3b.scala	Sat Mar 11 22:01:53 2023 +0000
@@ -15,5 +15,14 @@
 }
 
 
+import scala.concurrent._
+import scala.concurrent.duration._
+import ExecutionContext.Implicits.global
+import scala.language.postfixOps 
+
+lazy val f = Future {
 assert(count_all_tours_urban(5) == List(304, 0, 56, 0, 304, 0, 56, 0, 56, 0, 56, 0, 64, 0, 56))
+}
 
+Await.result(f, 32 second)
+