cccc cccf cccs ccfc ccff ccoc ccsf ccss ccst cctc cctt cfcf cfco cfcs cfos cftc coco coct cofc coff cofs coft coof coos coot cosc coso coss cost cotc coto cots cott cscc cscf csco cscs csfc csos csot cstc csto csts ctcf ctfc ctfo ctfs ctos ctot ctsc ctss ctts fccf fcot fcsc fcst fcto ffcc ffff ffss fftf foco focs fofo foof foos foot foso foss fost foto fots fott fscc fsfo fssc fssf ft-c ftfc ftos occc occt ocos oct- octo octs off- offc offo offs ofst ooff oofs oooo ooos oost oots oscc osco osoo osos osso ostc osts otfc oto- otof otoo otos otso otto otts s-os sccc sccs scct scfc scoo scot scsc scso scst sctc scto scts sfcc sfco sfcs sffc sfos sfss sfts soco socs sofo soft soof soos soot soso soss sost sotc soto sots sscc sscs ssfc ssoc ssot sssc sssf ssss sstc ssts stcc stcs stfc stof stoo stos stot stsf stss sttc tccc tcfc tcos tctc tcts tfot tfss tftc toco toff tofo toft toof toos toot tosc toso toss tost totc toto tots tott tscc tsfc tsos tssf tsst tstc tsts ttfc ttff ttss tttt