+# This test verifies operations under the Stack IMP ([Space]).
+
+SSSTSSSSSTN | ST: Push +65 (ASCII A)
+SSSTSSSSTSN | ST: Push +66 (ASCII B)
+SNS | ST: Duplicate TOS
+TNSS | IO: Output character
+SNT | ST: Swap TOS and NOS
+SNN | ST: Discard TOS
+TNSS | IO: Output character
+NNN | FC: Terminate program