[If] the pesach-offerings of two groups were confused, these take one for themselves, and the others take one for themselves. [Then] a member of one group comes to the other group, and a member of the other group comes to this group, and they declare the following, “If this pesach is ours, [then] you are withdrawn from your own [pesach] and you are registered on ours. But if this pesach is yours, then we withdraw from ours and we are registered on yours.”  Similarly, if there were five groups, each comprising five or ten [members], they take to themselves one person from each group and declare the same.