+adehnert-test-c IN CNAME adehnert-test-c.mit.edu.
+_acme-challenge.adehnert-test-c IN CNAME _acme-challenge.adehnert-test-c.dynamic
+adehnert-test-d IN CNAME adehnert-test-d.mit.edu.
+_acme-challenge.adehnert-test-d IN CNAME _acme-challenge.adehnert-test-d.dynamic