[[R]ambo]

Can someone help me on how to set players to random teams on onplayerrequestspawn or onplayerrequestclass. I made a team balancer in order to spawn each players evenly to both teams. The problem is, that I have about eight sets of team players. For example if I would have two teams so Team A and Team B are the main teams but then under Team A there's Pilot, Soldier, Bomber , Shopper and under Team B there's Pilot, Soldier, Bomber and also Shopper. so, How could I set forceable spawn to even teams in the onplayerclass/onplayerrequestspawn. Thank You.