--- a/main_marking3/re_test4.scala	Sun Sep 15 12:57:59 2024 +0100
+++ b/main_marking3/re_test4.scala	Mon Jul 21 16:38:07 2025 +0100
@@ -1,5 +1,8 @@
-import M3._
+
+def urbanmain() = {
 
-assert(denest(List(ONE, ZERO, ALTs(List(ONE, CHAR('a'))))) 
-   == List(ONE, ONE, CHAR('a')))
-assert(denest(List(ONE ~ ONE, ZERO, ZERO | ONE)) == List(ONE ~ ONE, ZERO, ONE))
+  import M3._
+
+  assert(denest(List(ONE, ZERO, ALTs(List(ONE, CHAR('a'))))) == List(ONE, ONE, CHAR('a')))
+  assert(denest(List(ONE ~ ONE, ZERO, ZERO | ONE)) == List(ONE ~ ONE, ZERO, ONE))
+}