b-u bbb bbc bbn bbo bbr bbs bbu bcb bcc bcn bco bcr bcs bcu bnb bnc bnn bno bnr bns bnu bob boc bon boo bor bos bou brb brn bro brr brs bru bsb bsc bsn bso bsr bss bsu bub buc bun buo bur bus buu c-- cbb cbc cbn cbo cbr cbs cbu ccb ccc ccn cco ccr ccs ccu cn- cnb cnc cnn cno cnr cns cnu co- cob coc con coo cor cos cou crb crc crn cro crr crs cru csb csc csn cso csr css csu cub cuc cun cuo cur cus cuu nbb nbc nbn nbo nbr nbs nbu ncb ncc ncn nco ncr ncs ncu nnb nnc nnn nno nns nnu no- nob noc non noo nor nos nou nrb nrc nrn nro nrr nrs nru nsb nsc nsn nso nsr nss nsu nub nuc nun nuo nur nus nuu ob- obb obc obn obo obr obs obu oc- ocb occ ocn oco ocr ocs ocu on- onb onc onn ono onr ons onu oo- oob ooc oon ooo oor oos or- orb orc orn oro orr ors oru os- osb osc osn oso osr oss osu ou- ouc oun ouo our ous rbb rbc rbn rbo rbr rbs rbu rcb rcc rcn rco rcr rcs rcu rnb rnc rnn rno rnr rns rnu rob roc ron roo ror ros rou rrb rrc rrn rrr rrs rru rsb rsc rsn rso rsr rss rsu rub ruc run ruo rur rus ruu sbb sbc sbn sbo sbr sbs sbu scb scc scn sco scr scs scu snb snc snn sno snr sns snu sob soc son soo sor sos sou sr- srb src srn sro srr srs ss- ssb ssc ssn sso ssr sss ssu sub suc sun suo sur sus suu ubb ubc ubn ubo ubr ubs ubu ucb ucc ucn uco ucr ucs ucu un- unb unc unn uno unr uns unu uob uoc uon uoo uor uos ur- urb urc urn uro urr urs uru usb usc usn uso usr uss usu uuc uun uur uus uuu

-ous bbbb bbbs bbrc bcbc bcbs bccc bccs bcnu bcor bcos bcrs bcru bcsc bcsn bcss bcuc bnoc bnor bnrr bnss bobb bobo bobs bobu boco bocs bocu bonc bonn bono bons bonu boob booc boon boor boos bor- born boro borr bors boru bosc bosn boso boss bosu boun bour bous brcb brno brns brob broc bron broo bror bros brou brrr brrs brsb brsr bruc brun brus bscs bsns bson bsos bssc bubb bubo bubs bubu bucc buco bucs bucu bunb bunn buno buns bunu buon bur- burb burn buro burr burs buru busc buss busu buus c-bo cbbc cbbs cbcc cbcn cbcr cbcs cbcu cbrn cbsc cbsn cbus ccbc ccbn cccb cccc cccs cccu ccnb ccnc ccnr ccns ccnu ccob ccoc ccrc ccrs ccsn ccss ccuc ccus cnbc cnco cnrc cnrr cnss cobb cobo cobs cobu coco cocu con- conc conn cono cons coob coon coos cor- corb corc corn coro corr cors cosc coso coss coub coun cour cous crbc crbu crcc crcr crns crob croc cron croo cror crss crub crun crus cscb cscc csco cscr cscs csob csor csos csrc csrs cssr csur csus cub- cubb cubs cucc cucn cuno cuon curb curn curo curr curs cusb cuso cuss cusu nbbc nbbo nbcc nbco nbcs ncbc ncbs nccc nccn nccr nccs nccu ncnc ncoc ncor ncos ncrc ncsc ncss nnnn nnos nnss nobc nobo nobs nobu noco nocs non- nonn nono nons nonu noo- noob noon nooo noor noos nor- norb norc norn noro norr nors nos- noss nosu noun nour nous nrcs nroc nron nrrc nrsc nsbo nscc nscs nsnr nsos nsou nsrc nssb nssc nsso nssr nsss nsub nubc nubs nucs nucu nunc nunn nuno nuns nuoc nuon nurc nurn nurr nurs nuru nuss nusu obbo obon obor obos obro obsn obsr obss obus ocbc occc occn ocon ocos ocro ocrr ocrs ocur onc- onco onno onon onor onos onsc onso onur onus oocr oons oooo ooos oous orbb orbo orbs orbu orco orcs ornc orno orns oro- oron oror oros orro orrs orso orsu orub orus oscc osco osno osnr osoo osor osos osro ossb osso ossu osun oubs oucc oun- our- ourn ouro ours ouu- rbbb rbbr rbbs rbss rcbc rcbo rccb rccc rccs rcnr rcon rcos rcsc rcss rnbr rnco rncs rob- robb robo robs robu rocc roco rocs ronc rono rons roob roon roor roos rorc roro roru rosc roso ross roub roun rous rrrr rrun rscc rscn rscs rsnn rsno rsnr rsos rubb rubs rubu runc runn runo runs rurc ruro rurs ruru ruso russ rusu ruun s-os sbbs sbcc sbcs sbor sbus sccc sccs scnr scob scon scoo scor scr- scrc scrn scrs scsc scsn scso scsr scsu scub scun scur sncc snco snns snob snoc snoo snor snos snrs snub snur snus sobo sobr sobs sobu soco socr socs son- sono sons sonu soon soor soos sorb sorn soro sorr sors soru soso soss soun sour sous srbc srcc srnn srno sros srub ssbn ssbr sscc sscs ssns ssoc ssrc ssrs sssb sssc ssss sub- subb subo subs suc- succ sucr sucs sun- sunb sunn suno suns sunu suor suos sur- surc surn suro surr surs suru sus- suso suss susu suus ubbo uboc ubon ubos ucbc ucon ucos ucrc ucsb ucsc ucsu uncc unco uncs unno unns unon unos unro unrs uns- unsc unso unus uocc uor- urbs urns uro- uroo urso urss ursu urun urur urus usbc usbr usbs uscc usco uscs usnc usno usnr usnu usoc usos ussb ussc ussr usss ussu usun usus uuno uuoc uuuu

bbsrc bbuss bo-bo boboc bobos bobr bocon bocor bocus bonon bonos bonou bonsu bonus boobs booco boons boorn boors booru borbo borcs born- borno borns bornu boro- boron boroo boros borou borro borsu borun borus bosco boscs bosns boson bosor bosso bosun bourn bours brobo brobs bronc bronn brons broon broos bross broun brous brrrr brunn