b-u bbb bbc bbh bbk bbr bbs bbu bcb bcc bch bck bcr bcs bcu bhb bhc bhh bhk bhr bhs bhu bkb bkc bkk bkr bks brb brh brk brr brs bru bsb bsc bsh bsk bsr bss bsu bub buc buh buk bur bus buu c-- cbb cbc cbh cbk cbr cbs cbu ccb ccc cch cck ccr ccs ccu ch- chb chc chh chk chr chs chu ckb ckc ckh cks crb crc crh crk crr crs cru csb csc csh csk csr css csu cub cuc cuh cuk cur cus cuu hbb hbc hbh hbk hbr hbs hbu hcb hcc hch hck hcr hcs hhb hhc hhh hhk hhr hhs hhu hkb hkh hkk hkr hks hku hr- hrb hrc hrh hrk hrr hrs hru hsb hsc hsh hsk hsr hss hsu hub huc huh huk hur hus huu kbb kbc kbh kbk kbr kbs kbu kcb kcc kch kck kcr kcs kcu khh khk khr khs khu kkb kkc kkh kkk kkr kks kku krc krk krr krs kru ksb ksc ksh ksk ksr kss ksu kub kuc kuh kuk kur kus kuu rbb rbc rbh rbk rbr rbs rbu rcb rcc rch rcr rcs rcu rh- rhb rhc rhh rhr rhs rhu rkb rkc rkk rks rku rrb rrc rrh rrk rrr rrs rru rsb rsc rsh rsk rsr rss rsu rub ruc ruh ruk rur rus ruu sbb sbc sbh sbk sbr sbs sbu scb scc sch sck scr scs scu sh- shb shc shh shk shr shs shu sk- skb skc skh skk skr sks sku sr- srb src srh srk srr srs ss- ssb ssc ssh ssk ssr sss ssu sub suc suh suk sur sus suu ubb ubc ubh ubk ubr ubs ubu ucb ucc uch uck ucr ucs ucu uhb uhc uhh uhr uhs uhu ukb ukc ukk ukr uku ur- urb urc urk urr urs uru usb usc ush usk usr uss usu uuc uur uus uuu

bbbb bbbs bbch bbhs bbrc bcbc bcbs bccc bccs bchs bcrs bcru bcsc bcss bcuc bhcc bhhs bhur bhuu bkhs brcb brhs brkb brrr brrs brsb brsr bruc bruh brus bscs bshs bssc bubb bubs bubu bucc buch buck bucs bucu buhr buhs bukh bukk buku bur- burb burh burk burr burs buru busc bush busk buss busu buus cbbc cbbs cbcc cbcr cbcs cbcu cbhs cbkr cbrh cbsc cbus ccbc cccb cccc cccs cccu cchr cchs ccrc ccrs ccss ccuc ccus chch chcs chhs chkb chks chrb chrc chrr chrs chsc chsh chsr chub chuk chur chus ckbc ckch ckck ckcs ckhs ckrc cksb cksh crbc crbu crcc crcr crhs crkc crss crub cruk crus cscb cscc csch cscr cscs cshs csks csrc csrs cssr csur csus cub- cubb cubs cucc cuck cuk- curb curr curs cusb cush cusk cuss cusu hbbs hbhs hbrs hbss hcbc hcbs hccb hccc hcch hccs hchs hcsc hcss hhhh hhhs hhus hkbu hkcc hkcs hrhs hrrc hsbc hscc hshs hsur hubb hubs huch huck hucs hucu huhs huhu hurk hurr hurs huru hush husk huss huub huus kbbb kbbc kbbk kbbr kbbs kbbu kbcb kbch kbck kbcr kbcs kbcu kbhb kbhc kbhh kbhr kbhs kbkb kbkk kbkr kbrb kbrc kbrh kbrk kbru kbsb kbsk kbsr kbss kbsu kbub kbuc kbuk kbur kbus kbuu kcbc kcbk kcbr kcbs kcbu kccb kccc kcck kccr kccu kchh kchk kchr kchs kchu kckc kckk kckr kcrc kcrh kcrr kcrs kcru kcsb kcsc kcsr kcss kcsu kcub kcuh kcuk khbc khbr khbs khcb khcc khch khck khcs khhk khhs khkk khkr khks khrk khrr khss khsu khub khuk khur khus kkbb kkbr kkbs kkcb kkch kkck kkcr kkcs kkhb kkhh kkhk kkhr kkkk kkrb kkrc kkrh kkrk kkrr kkrs kksr kkss kksu kkus kkuu krbb krbk krbr krcb krcc krch krcs krcu krhc krhs krkc krkh krkk krkr krks krku krrb krrc krrk krrr krrs krsc krsh krsk krsr krss krsu kruc kruh kruk krur ksbc ksbh ksbr ksbs kscb ksch ksck kscr kscs kscu kshb kshk kshr kshs kshu kskb kskk kskr ksks ksku ksrb ksrh ksrr ksrs kssr ksss kssu ksub ksuh ksuu kubb kubc kubr kubs kubu kucb kucc kuch kucr kuhs kuhu kukh kukk kuks kuku kurb kurk kurr kurs kuru kusb kusc kush kusu kuub kuuk kuur kuuu rbbb rbbr rbbs rbhs rbss rcbc rccb rccc rccs rchb rchs rcsc rcss rhhs rhus rkss rrhs rrrr rscc rsch rscs rshs rubb rubs rubu ruch ruck ruhh ruhr ruhs rukh rukk ruku rurc rurs ruru rush rusk russ rusu sbbs sbcc sbcs sbhc sbhk sbhs sbrk sbus sccc sccs sch- schh schr schs sck- scr- scrc scrs scsc scsh scsr scsu scub scur shbs shcc shhh shhs shrs shsc shub shuk shur shus shuu skhs skss skur srbc srcc srch srhs srub ssbr sscc sscs sshs ssrc ssrs sssb sssc sssh ssss sub- subb subh subs suc- succ such suck sucr sucs suhb suhr sukh suks suku sur- surc surr surs suru sus- susk suss susu suus ucbc uchs ucrc ucsb ucsc ucsu uhrs uhss uhuh ukcc ukrc uksc ukur urbs urch urrh urss ursu uruk urur urus us-k usbc usbr usbs uscc usch uscs ushr ushs ushu ussb ussc ussr usss ussu usus uuuu

b-r-k bbsrc bbuss brrrr bruch bruck bruhs brush brusk bruss buchs buchu bucks bucku bucsu bucur bukk- buksh burbs burch burck burcu burks burrs burru buruc buruk burus busch busks bussu busur busuu c-bus ccccc chubb chubs chuck chur- churk churr churs churu chuss chuuk cruck crush cubub cucks cucuk curbs curch currs cusks hhhhh hubbs hubur hucch hucks huhuh huhus husch husks huuru khuru khush khuur krush kuchu kucuk kuksu kukur kurbu kurch kurku kursk kuruc kuruk kurus kusch kushk kusuh kusur kuusk rubus rucks ruhrs ruhub rukhs rukus rusch rushh rusks russh s-bus s-sch sbuks sccbc schuh schur scrch scrub scrus scurr shhhh shrub shubb shuch shuck shukr shurk shuru shush skruk skurr skuru sssrb ssssh sssss ssukh subbu subss subuk suck- sucks sucr- suhur sukru sukuh sukuk