cccc cccp cccs cccv ccoc ccpp ccps ccsp ccss ccvo ccvs coco cocp coop coos copo copp cops cosc coso cosp coss covo cpcs cpos cpps cpsc cpso cpvc cscc csco cscs csos cspc csps cvcc cvss occc ocos ocpp oooo ooos oops opo- opos oppo opps oscc osco osoo osos osov osso ovcs ovo- ovoo ovpp pccc pccs pcos pcpp pcps pcso poco pocs poop poos pop- popc popo popp pops poso poss povo povs ppcc ppcs ppos pppo pppp ppps ppss psco psoc psos psov pspp psps pssc psso pvco pvcs s-os sccc sccp sccs scoo scop scpo scps scsc scso scvp soco socs soop soos sopo sopp sops soso soss sosv sovo sovs spcc spco spcs spoc spoo spop spos spps spso spsp spss sscc sscp sscs ssoc ssop sspc sspo ssps sssc ssss ssvp svcc svcs svsc vooc voso voss vsop vssc vvvv