--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/testing/mark	Sun Nov 05 12:02:09 2017 +0000
@@ -0,0 +1,8 @@
+#!/bin/sh
+###set -e
+
+trap "exit" INT
+
+./collatz_test output1
+
+