I'm a very shy girl first day in this new school

Sorry miss, but I didn't understand very well how to apply the rules.

Now for example. Melonie has lost the right to punish the boys for the task gone wrong, and there is no boy to punish because all are enough.

But for example, if they had all been low grades; girls would be forbidden to hit boys who, however, had to be beaten.

vice versa, all high marks. No boys beaten but, then wouldn't it have been like punishing girls while forbidding them from punishing boys?

How do we deal with similar cases?