diff -r 7acbef680bef -r f5c0749858fd main_marking5/bf_test4c.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main_marking5/bf_test4c.scala	Sat Mar 11 22:01:53 2023 +0000
@@ -0,0 +1,6 @@
+import M5a._
+
+val urban_generate = 
+"""+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++.[-]++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++.[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++.[-]"""
+
+assert(generate("ABC".toList) == urban_generate)