How so? [If] he performed maamar with one and [then] maamar with the other, they require two bill of divorce and chalitzah; maamar with one and [then] a bill of divorce to the other, she requires a bill of divorce and chalitzah; maamar with one and [then] he cohabited with the other, they require two bills of divorce and chalitzah; maamar with one and [then] he performed chalitzah with the other, the first one requires a bill of divorce.  [If he gave] a bill of divorce to one and [then] a bill of divorce to the other, they require chalitzah from him; a bill of divorce to one and [then] he cohabited with the other, she requires a bill of divorce and chalitzah; a bill of divorce to one and [then] maamar with the other, she requires a bill of divorce and chalitzah; a bill of divorce to one and [then] chalitzah to the other —- there is nothing after chalitzah.