Two ejecting one is invalid and not to be done. Two ejecting two is invalid and not to be done. Two ejecting three is invalid and not to be done. Two ejecting a sangha is invalid and not to be done. Three ejecting one is invalid and not to be done. Three ejecting two is invalid and not to be done. Three ejecting three is invalid and not to be done. Three ejecting a sangha is invalid and not to be done. A sangha ejecting a sangha is invalid and not to be done. There are four kinds of legal procedures: