The UG does not explicitly say that for class codes, the number must be before the alphabet, and that the number can only be from 1 to 6.  <!--session: 1650088450448-ee56af0d-4af6-4b3b-8348-452c3abf3e0c--><!--Version: Web v3.4.2-->
The UG does not explicitly say that for class codes, the number must be before the alphabet, and that the number can only be from 1 to 6.
