Creates a predicate abstraction sumti out of a full bridi clause, binding all the necessary lambda variables to the ko'a-ko'u pronoun series.
lo ka ce'u ce'u ce'u broda (ku) = ko'ai ko'a ko'e ko'i broda (ku'au). In the rare cases where more than five lambda variables are needed, ko'a xi PA might be used. Indicating the number N of lambda variables in forethought can be acheived with ko'ai xi N. See also fo'ai, ce'ai.