regina(1) on Linux
The text 7bec639445c5, as Debian 12 (Bookworm), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy) shipped it.
The Regina Rexx Interpreter
Flags it lists
-
-a -
-c -
-e -
-i -
-p -
-tx -
-v