cccc cccs ccoc ccow ccss ccst cctc cctt coco coct coos coot cosc coso coss cost cotc coto cots cott cotw cows cowt cscc csco cscs csos csot cstc csto csts csws ctos ctot ctsc ctss ctts cttw cwos cwot cwts occc occt ocos ocsw oct- octo octs oooo ooos oost oots ootw oscc osco osoo osos osow osso ostc osts oto- otoo otos otow otso otto otts otwo owow owt- owtt s-os sccc sccs scct scoo scot scow scsc scso scst sctc scto scts soco socs soos soot soso soss sost sotc soto sots sotw sows sowt sscc sscs ssoc ssot sssc ssss sstc ssts ssws stcc stcs stoo stos stot stow stss sttc swcc swoo swot swow swss swts tccc tcos tctc tcts toco toos toot tosc toso toss tost totc toto tots tott tows tscc tsos tsst tstc tsts ttss tttt two- twoc twoo twos twot twss wccc wcco wccs wcct wccw wcoc wcoo wcos wcot wcsc wcso wcss wcst wcsw wctc wcto wcts wctt wctw wcwc wocc woco wocs wooc woos woot woow woso woss wost wosw wotc wots wott wotw wowc wowo wows wowt woww wscc wsco wscs wscw wsoc wsoo wsos wssc wsss wsst wssw wstc wsto wsts wstt wstw wsws wswt wsww wtcc wtco wtcs wtct wtcw wtoc wtot wtow wtso wtss wttc wtto wtts wttt wttw wtwo wtws wtwt wtww wwco wwcs wwct wwcw wwos wwot wwow wwsc wwss wwst wwtc wwtw wwwc wwws wwww