[If] he performed chalitzah and [then] performed chalitzah, or he performed chali- tzah and [then] maamar, [or] gave a bill of divorce or cohabited; or [if] he cohabited and [then] cohabited, or he cohabited and [then] performed maamar, [or] gave a bill of divorce or performed chalitzah —- there is nothing after chalitzah. It is the same whether [it was] one yavam with two yevamos, or two yevamim with one yevamah.