--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core_marking1/collatz_test3.scala	Mon Apr 11 23:55:27 2022 +0100
@@ -0,0 +1,4 @@
+
+assert(C1.last_odd(113) == 85)
+assert(C1.last_odd(84) == 21)
+assert(C1.last_odd(605) == 341)