c-cd cccc cccs ccdc ccds ccoc ccod ccsd ccss ccst cctc cctt cdcs cdos cdot cdss coco coct codd cods cood coos coot cosc coso coss cost cotc coto cots cott cscc cscd csco cscs csos csot cssd cstc cstd csto csts ctos ctot ctsc ctss ctts dccc dccs dcct dcds dcos dcsc dcss dctc dcts dddd ddoc ddot ddss ddts doco docs doct dod- dodd dodo dods dood doos doot doso doss dost dotd doto dots dott dscc dscs dsos dssc dsst dstc dsto dsts dtcc dtot dtss occc occt ocds ocos oct- octo octs oddd odds odoo odos odot odso odts oooo ooos oost oots oscc osco osoo osos ossd osso ostc osts otcd oto- otoo otos otso otto otts s-os sccc sccs scct scdc scds scoo scot scsc scsd scso scst sctc sctd scto scts sdcc sdco sddc sdds sdot sdsc sdss soco socs sodd sodo sods sood soos soot soso soss sost sotc soto sots sscc sscs ssdc ssdd ssoc ssot sssc ssss sstc sstd ssts stcc stcs stds stod stoo stos stot stss sttc sttd tccc tcdd tcos tctc tcts tdss toco todd todo tods todt tood toos toot tosc toso toss tost totc totd toto tots tott tscc tsos tsst tstc tsts ttss tttt