-ous bbbb bbbs bbdd bbdo bcbc bcbs bccc bccs bcds bcos bcsc bcss bctc bcts bcuc bdbc bddc bdos bdsd bobb bobo bobs bobu boco bocs bocu bodb bodo bods bodu boob booc bood boos boot bosc boso boss bost bosu botb botd boto bots bott boud bous bout bsbd bscs bsod bsos bssc bssd bsts btcc btcs btdt btob btss bttb btus bubb bubo bubs bubu bucc buco bucs bucu budb budd budo buds budu busc buss bust busu but- buto buts butt buus c-bo c-cd cbbc cbbs cbcc cbcs cbct cbcu cbdb cbdc cbdo cbds cbot cbsc cbtc cbus ccbc cccb cccc cccs cccu ccdc ccds ccob ccoc ccod ccsd ccss ccst cctb cctc cctt ccuc ccus ccut cdcs cddb cdos cdot cdss cobb cobo cobs cobu coco coct cocu codd cods coob cood coos coot cosc coso coss cost cotb cotc coto cots cott cotu coub coud cous cout cscb cscc cscd csco cscs csdb csob csos csot cssd cstc cstd csto csts csus ctbs ctos ctot ctsc ctss ctsu ctts cub- cubb cubs cucc cuds cusb cusd cuso cuss cust cusu cut- cutc cuto cuts cutt d-bo dbcc dbcs dbos dbss dbtt dbus dcbc dccb dccc dccs dcct dccu dcdb dcds dcos dcsc dcss dctc dcts dddd ddoc ddot ddss ddts ddub dobb dobs dobu doco docs doct docu dod- dodd dodo dods doob dood doos doot doso doss dost dotd doto dots dott doub douc doud dous dout dsbc dscc dscs dsos dssc dsst dstc dsto dsts dtcc dtot dtss dub- dubb dubc dubs dubu duco ducs duct dudd dudo duds dudu duo- duos dust duts duut obbo obdt obos obot obsd obss obst obtd obts obus ocbc occc occt ocds ocos oct- octo octs odbo oddd odds odoo odos odot odou odso odts odtu odus oooo ooos oost ootb oots oous oscc osco osoo osos ossb ossd osso ossu ostc osts otbd otbs otcd oto- otoo otos otso otsu otto otts ottu otus oubs oucc oudc ouds ousd oust out- outb outo outs ouu- s-os sbbs sbcc sbcs sbct sbds sbot sbsd sbst sbtc sbus sccc sccs scct scdc scds scob scoo scot scsc scsd scso scst scsu sctc sctd scto scts scub scud scut sdcc sdco sddc sdds sdot sdsc sdss sdsu sobo sobs sobt sobu soco socs sodd sodo sods sodu sood soos soot soso soss sost sotc soto sots sotu soud sous sout sscc sscs ssdc ssdd ssoc ssot sssb sssc ssss sstb sstc sstd ssts stbc stbd stbs stcc stcs stcu stds stob stod stoo stos stot stou stss sttc sttd stub stuc stud stus stut sub- subb subd subo subs suc- succ sucs sudd sudo suds suos sus- susd suso suss sust susu suto sutu suus tbbs tbcb tbcc tbcd tbst tcbs tccc tccu tcdd tcos tctc tcts tddb tdss tobo tobs tobt tobu toco todd todo tods todt todu tood toos toot tosb tosc toso toss tost tosu totc totd toto tots tott tous tout tsbc tsbd tscc tsdb tsob tsos tsou tsst tstc tsts ttbb ttss tttt tubb tubo tubs tubu tucc tuco tudu tuos tusc tusd tuss tust tuto tuts tutt tutu tuuo ubbo uboc ubod ubos ubud ucbc ucdc ucdd ucos ucsb ucsc ucsd ucst ucsu ucut udbc udds udoo udos udot udsd udts uocc usbc usbs uscc usco uscs usdc usdo usds usdt usoc usos ussb ussc usss usst ussu ustb ustc usto usts usus utsc utto uttu uuoc uuuu