b-u bbb bbc bbh bbk bbn bbo bbr bbu bcb bcc bch bck bcn bco bcr bcu bhb bhc bhh bhk bho bhr bhu bkb bkc bkk bkn bko bkr bnb bnc bnk bnn bno bnr bnu bob boc boh bok bon boo bor bou brb brh brk brn bro brr bru bub buc buh buk bun buo bur buu c-- cbb cbc cbh cbk cbn cbo cbr cbu ccb ccc cch cck ccn cco ccr ccu ch- chb chc chh chk chn cho chr chu ckb ckc ckh cko cn- cnb cnc cnh cnn cno cnr cnu co- cob coc coh cok con coo cor cou crb crc crh crk crn cro crr cru cub cuc cuh cuk cun cuo cur cuu hbb hbc hbh hbk hbn hbo hbr hbu hcb hcc hch hck hcn hco hcr hhb hhc hhh hhk hhn hho hhr hhu hkb hkh hkk hkn hko hkr hku hnb hnc hnh hnk hnn hno hnu hob hoc hoh hok hon hoo hor hou hr- hrb hrc hrh hrk hrn hro hrr hru hub huc huh huk hun huo hur huu kbb kbc kbh kbk kbn kbo kbr kbu kcb kcc kch kck kcn kcr kcu khh khk khn kho khr khu kkb kkc kkh kkk kkn kkr kku kn- knc knk knn kno knr knu kob koc koh kok kon koo kor kou krc krk krn kro krr kru kub kuc kuh kuk kun kur kuu nbb nbc nbk nbn nbo nbr nbu ncb ncc nch nck ncn nco ncr ncu nhb nhc nhh nhk nhn nhr nhu nkc nkk nkn nko nkr nku nnb nnc nnh nnk nnn nno nnu no- nob noc noh nok non noo nor nou nrb nrc nrk nrn nro nrr nru nub nuc nuh nuk nun nuo nur nuu ob- obb obc obh obk obn obo obr obu oc- ocb occ och ock ocn oco ocr ocu ohc ohh ohn oho ohr ohu okb okc okk oko okr oku on- onb onc onh onk onn ono onr onu oo- oob ooc ooh ook oon ooo oor or- orb orc orh ork orn oro orr oru ou- ouc ouh ouk oun ouo our rbb rbc rbh rbk rbn rbo rbr rbu rcb rcc rch rcn rco rcr rcu rh- rhb rhc rhh rhn rho rhr rhu rkb rkc rkk rko rku rnb rnc rnh rnn rno rnr rnu rob roc roh rok ron roo ror rou rrb rrc rrh rrk rrn rrr rru rub ruc ruh ruk run ruo rur ruu ubb ubc ubh ubk ubn ubo ubr ubu ucb ucc uch uck ucn uco ucr ucu uhb uhc uhh uho uhr uhu ukb ukc ukk ukn ukr uku un- unb unc unh unk unn uno unr unu uob uoc uok uon uoo uor ur- urb urc urk urn uro urr uru uuc uun uur uuu

-hou bbbb bbch bbrc bcbc bccc bcnu bcor bcru bcuc bhcc bhor bhur bhuu bnoc bnor bnrr bobb bobo bobu boch bock boco bocu bohn boho bohr bohu bokn boko boku bonc bonk bonn bono bonu boob booc booh book boon boor bor- borh bork born boro borr boru bouh bouk boun bour brcb brkb brno brob broc broh brok bron broo bror brou brrr bruc bruh brun bubb bubo bubu bucc buch buck buco bucu buho buhr bukh bukk buko buku bunb bunk bunn buno bunu buon bur- burb burh burk burn buro burr buru c-bo cbbc cbcc cbcn cbcr cbcu cbkn cbko cbkr cbrh cbrn ccbc ccbn cccb cccc cccu cchr ccnb ccnc ccnr ccnu ccob ccoc ccrc ccuc chch chkb chnb chnc chno chnr choc choh chok chon choo chor chou chrb chrc chrn chro chrr chub chuk chun chur ckbc ckch ckck ckco cknb cknc ckob ckoc ckoo ckor ckrc cnbc cnco cnoh cnrc cnrr cobb cobh cobo cobu coch cock coco cocu cohn coho cok- coko con- conc conk conn cono coob cooh cook coon cor- corb corc cork corn coro corr coub couk coun cour crbc crbu crcc crcr crkc crob croc croh crok cron croo cror crub cruk crun cub- cubb cucc cuck cucn cuk- cuno cuon curb curn curo curr hboc hcbc hccb hccc hcch hhhh hkbu hkcc hobo hoch hock hocn hocr hohn hoho hoko hoku honk hono honu hook hoon hoor horc hork horn horo horr houk hour hrob hron hrrc hrun hubb hubo huch huck hucu huhn huhu hunc hunh hunk huon huor hurk hurn huro hurr huru huub kbbb kbbc kbbk kbbo kbbr kbbu kbcb kbch kbck kbco kbcr kbcu kbhb kbhc kbhh kbhn kbhr kbkb kbkk kbko kbkr kbnh kbnn kbno kbnr kbnu kbob kboc kbok kbon kboo kbrb kbrc kbrh kbrk kbrn kbro kbru kbub kbuc kbuk kbun kbur kbuu kcbc kcbk kcbr kcbu kccb kccc kcck kccr kccu kchh kchk kchn kcho kchr kchu kckc kckk kckn kcko kckr kcnb kcnh kcno kcnr kcob kcoh kcon kcor kcou kcrc kcrh kcrn kcro kcrr kcru kcub kcuh kcuk khbc khbr khcb khcc khch khck khhk khho khkk khkn khkr khnc khnk khnr khnu khob khoc khok khon khor khou khrk khro khrr khub khuk khun khur kkbb kkbn kkbo kkbr kkcb kkch kkck kkcn kkco kkcr kkhb kkhh kkhk kkhr kkkk kknb kknn kkno kknu kkob kkoh kkon kkoo kkor kkrb kkrc kkrh kkrk kkrn kkro kkrr kkuu knbb knbc knbn knbr knbu kncb knch knck kncn knco kncr kncu knhc knhk knkk knnb knnk knnr knob knoc knok knon knor knou knrb knrk knro knub knuk knur kobb kobc kobk kobn kobo kobr kobu kocb koch kock kocn kohh kohn koho kohr kohu kokb kokc kokh kokk kokn koko kokr koku konc konk kono koob kooc kook koon kooo koor koou korb korc kork korn koro korr koru koub kour kouu krbb krbk krbr krcb krcc krch krcn krco krcu krhc krkc krkh krkk krkn krko krkr krku krnb krnh krnk krnn krno krnu krob kroc kroh krok kroo kror krrb krrc krrk krrn krro krrr kruc kruh kruk