Thanks so much for your reply and suggestion! I tweaked the code and it works great to show the variations possible for these 2 roles.
Followup question: I have 7+ roles. With this setup, would I have to manually account for each possible combination of roles? Or am I misinterpreting the code?
i.e. Would I have to create code for:
Role1 && Role2
Role1 && Role2 && Role3
Role1 && Role3
Role1 && Role3 && Role4
etc…
(If my math is correct there are over 5000 possible combinations of 7 different roles 
)