b-u bbb bbc bbd bbo bbs bbt bbu bcb bcc bcd bco bcs bct bcu bdb bdc bdd bdo bds bdt bdu bob boc bod boo bos bot bou bsb bsc bsd bso bss bst bsu btb btc btd bto bts btt btu bub buc bud buo bus but buu c-- cbb cbc cbd cbo cbs cbt cbu ccb ccc ccd cco ccs cct ccu cdb cdc cdd cdo cds cdt cdu co- cob coc cod coo cos cot cou csb csc csd cso css cst csu ctb ctc ctd cto cts ctt ctu cub cuc cud cuo cus cut cuu dbb dbc dbd dbo dbs dbt dbu dcb dcc dcd dco dcs dct dcu ddb ddc ddd ddo dds ddt ddu dob doc dod doo dos dot dou dsb dsc dsd dso dss dst dsu dtb dtc dtd dto dts dtt dtu dub duc dud duo dus dut ob- obb obc obd obo obs obt obu oc- ocb occ ocd oco ocs oct ocu odb odc odd odo ods odt odu oo- oob ooc ood ooo oos oot os- osb osc osd oso oss ost osu ot- otb otc otd oto ots ott otu ou- ouc oud ouo ous out sbb sbc sbd sbo sbs sbt sbu scb scc scd sco scs sct scu sdb sdc sdd sdo sds sdt sdu sob soc sod soo sos sot sou ss- ssb ssc ssd sso sss sst ssu stb stc std sto sts stt stu sub suc sud suo sus sut suu tbb tbc tbd tbo tbs tbt tbu tcb tcc tcd tco tcs tct tcu tdb tdc tdd tdo tds tdt tdu to- tob toc tod too tos tot tou tsb tsc tsd tso tss tst tsu ttb ttc ttd tto tts ttt ttu tub tuc tud tuo tus tut tuu ubb ubc ubo ubs ubt ubu ucb ucc ucd uco ucs uct ucu udb udc udd udo uds udt udu uob uoc uod uoo uos uot usb usc usd uso uss ust usu utb utc utd uto uts utt utu uuc uus uut uuu

-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

bbuss bcbst bdubs bo-bo boboc bobos bobst bobts bocus bodd- bodoc bodos boobs booco boost boots bosco boscs bosso bosut botos botou botts bottu botus boudu boust bouto bouts bscco bsous btstu bucco bucsu budds buddu budoc budos busot busso bussu busto busts busut busuu butdo buto- butot butou butts butuo butut c-bus c-dot ccccc cccsd co-bo co-co cobbs cobot cobus cocc- cocco cocos cocto cocus codco codo codos coost coots cos-b cosco cost- costo costs cotos cotso cott-