b-u bbb bbd bbi bbk bbn bbr bbs bbu bdb bdd bdi bdk bdr bds bdu bi- bib bid bii bik bin bir bis biu bkb bkk bkn bkr bks bnb bnd bni bnk bnn bnr bns bnu brb brd bri brk brn brr brs bru bsb bsd bsi bsk bsn bsr bss bsu bub bud bui buk bun bur bus buu dbb dbd dbi dbk dbn dbr dbs dbu ddb ddd ddi ddk ddn ddr dds ddu di- dib did dii dik din dir dis diu dkb dki dkk dkr dks dku dnb dnd dni dnk dnn dnr dns drb drd dri drk drn drr drs dru dsb dsd dsi dsk dsn dsr dss dsu dub dud dui duk dun dur dus i-d ibb ibd ibi ibk ibn ibr ibs ibu idb idd idi idk idn idr ids idu iib iid iii iin iir iis iiu ikb iki ikk ikr iks iku in- inb ind ini ink inn inr ins inu ir- irb ird iri irk irn irr irs iru is- isb isd isi isk isn isr iss isu iu- iub iud iui iur ius kbb kbd kbi kbk kbn kbr kbs kbu kdb kdk kdr kds kdu kib kid kii kik kin kir kis kiu kkb kki kkk kkn kkr kks kku kn- knd kni knk knn knr knu krd kri krk krn krr krs kru ksb ksd ksi ksk ksn ksr kss ksu kub kud kui kuk kun kur kus kuu n-i nbb nbd nbi nbk nbn nbr nbs nbu ndb ndd ndi ndk ndn ndr nds ndu nib nid nii nik nin nir nis niu nki nkk nkn nkr nks nku nnb nni nnk nnn nns nnu nrb nrd nri nrk nrn nrr nrs nru nsb nsd nsi nsk nsn nsr nss nsu nub nud nui nuk nun nur nus nuu rbb rbd rbi rbk rbn rbr rbs rbu rdb rdd rdi rdn rdr rds rdu rib rid rii rik rin rir ris rkb rkk rks rku rnb rnd rni rnn rnr rns rnu rrb rrd rri rrk rrn rrr rrs rru rsb rsd rsi rsk rsn rsr rss rsu rub rud rui ruk run rur rus ruu sbb sbd sbi sbk sbn sbr sbs sbu sdb sdd sdi sdk sdn sdr sds sdu sib sid sii sik sin sir sis siu sk- skb skd ski skk skr sks sku snb snd sni snk snn snr sns snu sr- srb srd sri srk srn srr srs ss- ssb ssd ssi ssk ssn ssr sss ssu sub sud sui suk sun sur sus suu ubb ubi ubk ubn ubr ubs ubu udb udd udi udk udn udr uds udu uib uid uii uin uir uis uiu ukb uki ukk ukn ukr uku un- unb und uni unk unn unr uns unu ur- urb urd uri urk urn urr urs uru usb usd usi usk usn usr uss usu uun uur uus uuu