-ous bbbb bbbs bcbc bcbs bccc bccs bcos bcsc bcss bctc bcts bcuc bobb bobo bobs bobu boco bocs bocu boob booc boos boot bosc boso boss bost bosu botb boto bots bott bous bout bscs bsos bssc bsts btcc btcs btob btss bttb btus bubb bubo bubs bubu bucc buco bucs bucu busc buss bust busu but- buto buts butt buus c-bo cbbc cbbs cbcc cbcs cbct cbcu cbot cbsc cbtc cbus ccbc cccb cccc cccs cccu ccob ccoc ccss ccst cctb cctc cctt ccuc ccus ccut cobb cobo cobs cobu coco coct cocu coob coos coot cosc coso coss cost cotb cotc coto cots cott cotu coub cous cout cscb cscc csco cscs csob csos csot cstc csto csts csus ctbs ctos ctot ctsc ctss ctsu ctts cub- cubb cubs cucc cusb cuso cuss cust cusu cut- cutc cuto cuts cutt obbo obos obot obss obst obts obus ocbc occc occt ocos oct- octo octs oooo ooos oost ootb oots oous oscc osco osoo osos ossb osso ossu ostc osts otbs oto- otoo otos otso otsu otto otts ottu otus oubs oucc oust out- outb outo outs ouu- s-os sbbs sbcc sbcs sbct sbot sbst sbtc sbus sccc sccs scct scob scoo scot scsc scso scst scsu sctc scto scts scub scut sobo sobs sobt sobu soco socs soos soot soso soss sost sotc soto sots sotu sous sout sscc sscs ssoc ssot sssb sssc ssss sstb sstc ssts stbc stbs stcc stcs stcu stob stoo stos stot stou stss sttc stub stuc stus stut sub- subb subo subs suc- succ sucs suos sus- suso suss sust susu suto sutu suus tbbs tbcb tbcc tbst tcbs tccc tccu tcos tctc tcts tobo tobs tobt tobu toco toos toot tosb tosc toso toss tost tosu totc toto tots tott tous tout tsbc tscc tsob tsos tsou tsst tstc tsts ttbb ttss tttt tubb tubo tubs tubu tucc tuco tuos tusc tuss tust tuto tuts tutt tutu tuuo ubbo uboc ubos ucbc ucos ucsb ucsc ucst ucsu ucut uocc usbc usbs uscc usco uscs usoc usos ussb ussc usss usst ussu ustb ustc usto usts usus utsc utto uttu uuoc uuuu