c-cor c-p-c c-pop ccccc co-co co-op cocc- cocco cocur coorg coppo copr- copro copur coro- corop couco couru croco croop cropc cropo croup cruor cuoco cupr- cupro curro curug curup go-go go-oo go-op gocco gocoo gocup gogro gopro gorgo grgur grogg groop gropp group grrrr guroo gurro gurur occur ogogo ogugu ooooo orcop oroco orrgo oruro ouoro po-po pocop poopo popco popop poppo popup porco porcu porgo poro- porog porro porur progg proor prop- propp propr puppo puro- r-co- ro-ro rocco rocor rocou rprop u-pop ugro- ugrug urour urucu uuuuu