--- a/core_testing1/collatz_test3.scala	Wed Nov 01 15:01:32 2023 +0000
+++ b/core_testing1/collatz_test3.scala	Thu Nov 02 11:32:10 2023 +0000
@@ -1,4 +1,8 @@
 
-assert(C1.last_odd(113) == 85)
-assert(C1.last_odd(84) == 21)
-assert(C1.last_odd(605) == 341)
+def urbanmain() = {
+
+  assert(C1.last_odd(113) == 85)
+  assert(C1.last_odd(84) == 21)
+  assert(C1.last_odd(605) == 341)
+
+}