Going through and trying to determine the possible combinations of roles at this time would be pointless, but one thing I want to point out is that we could have 2 scum in this game, 3 scum, 2 scum + SK, or 3 scum + SK. The latter is most unlikely, but certainly possible, so we definitely need to be on our toes because we could be dealing with a heavy scum team.
That being said, we can also use knowledge of the setup later on to our advantage, which is why it's important that everybody familiarizes themselves with it. As we lose people, town or scum, we can narrow down the possibilities for the combination of roles that are in this game and help us determine how many scum are actually in it.