b-u bbb bbd bbh bbk bbn bbo bbr bbu bdb bdd bdh bdk bdo bdr bdu bhb bhd bhh bhk bho bhr bhu bkb bkk bkn bko bkr bnb bnd bnk bnn bno bnr bnu bob bod boh bok bon boo bor bou brb brd brh brk brn bro brr bru bub bud buh buk bun buo bur buu dbb dbd dbh dbk dbn dbo dbr dbu ddb ddd ddh ddk ddn ddo ddr ddu dh- dhb dhd dhh dhk dho dhr dhu dkb dkk dko dkr dku dnb dnd dnh dnk dnn dno dnr dob dod doh dok don doo dor dou drb drd drk drn dro drr dru dub dud duh duk dun duo dur hbb hbd hbh hbk hbn hbo hbr hbu hdb hdd hdh hdk hdn hdo hdr hdu hhb hhd hhh hhk hhn hho hhr hhu hkb hkd hkh hkk hkn hko hkr hku hnb hnd hnh hnk hnn hno hnu hob hod hoh hok hon hoo hor hou hr- hrb hrd hrh hrk hrn hro hrr hru hub hud huh huk hun huo hur huu kbb kbd kbh kbk kbn kbo kbr kbu kdb kdh kdk kdo kdr kdu khh khk khn kho khr khu kkb kkh kkk kkn kkr kku kn- knd knk knn kno knr knu kob kod koh kok kon koo kor kou krd krk krn kro krr kru kub kud kuh kuk kun kur kuu nbb nbd nbk nbn nbo nbr nbu ndb ndd ndh ndk ndn ndo ndr ndu nhb nhd nhh nhk nhn nhr nhu nkk nkn nko nkr nku nnb nnh nnk nnn nno nnu no- nob nod noh nok non noo nor nou nrb nrd nrk nrn nro nrr nru nub nud nuh nuk nun nuo nur nuu ob- obb obd obh obk obn obo obr obu odb odd odh odn odo odr odu ohd ohh ohn oho ohr ohu okb okd okk oko okr oku on- onb ond onh onk onn ono onr onu oo- oob ood ooh ook oon ooo oor or- orb ord orh ork orn oro orr oru ou- oud ouh ouk oun ouo our rbb rbd rbh rbk rbn rbo rbr rbu rdb rdd rdh rdn rdo rdr rdu rh- rhb rhd rhh rhn rho rhr rhu rkb rkk rko rku rnb rnd rnh rnn rno rnr rnu rob rod roh rok ron roo ror rou rrb rrd rrh rrk rrn rrr rru rub rud ruh ruk run ruo rur ruu ubb ubh ubk ubn ubo ubr ubu udb udd udk udn udo udr udu uhb uhd uhh uho uhr uhu ukb ukk ukn ukr uku un- unb und unh unk unn uno unr unu uob uod uok uon uoo uor ur- urb urd urk urn uro urr uru uun uur uuu