cccc cccl cccs cclc ccls ccoc ccsl ccss ccst cctc cctl cctt cloo clos clot clsc cltc clts coco coct col- coll colo cols colt cool coos coot cosc cosl coso coss cost cotc coto cots cott cscc cscl csco cscs csos csot cstc csto csts ctls ctol ctos ctot ctsc ctss ctts lccc lccs lcls lcsc lctl lcto lcts llcc llcs lllc llll lloc lloo locc loco locs loll lolo lols looc lool loos loot losc loso loss lost lotl loto lots lott lsco lscs lsso lsts ltcc ltcs lttc occc occt oclc ocos oct- octo octs olcc ollo olos olot olst oolo oooo ooos oost oots oscc oscl osco oslo osoo osos osso ostc osts otcl oto- otoo otos otso otto otts s-os sccc sccl sccs scct scl- sclc scls scol scoo scot scsc scsl scso scst sctc sctl scto scts slcc sloc sloo slos slot slsc slst slts socl soco socs soll solo sols solt sool soos soot soso soss sost sotc sotl soto sots sscc sscs sslc sslt ssoc ssot sssc ssss sstc sstl ssts stcc stcs stlc stlo stlt stol stoo stos stot stss sttc tccc tcos tctc tcts tlco tlos toco tol- toll tolo tolt tool toos toot tosc toso toss tost totc toto tots tott tscc tsol tsos tsst tstc tsts ttss tttt