b-u bbb bbi bbk bbn bbr bbs bbu bi- bib bii bik bin bir bis biu bkb bkk bkn bkr bks bnb bni bnk bnn bnr bns bnu brb bri brk brn brr brs bru bsb bsi bsk bsn bsr bss bsu bub bui buk bun bur bus buu ibb ibi ibk ibn ibr ibs ibu iib iii iin iir iis iiu ikb iki ikk ikr iks iku in- inb ini ink inn inr ins inu ir- irb iri irk irn irr irs iru is- isb isi isk isn isr iss isu iu- iub iui iur ius kbb kbi kbk kbn kbr kbs kbu kib kii kik kin kir kis kiu kkb kki kkk kkn kkr kks kku kn- kni knk knn knr knu kri krk krn krr krs kru ksb ksi ksk ksn ksr kss ksu kub kui kuk kun kur kus kuu n-i nbb nbi nbk nbn nbr nbs nbu nib nii nik nin nir nis niu nki nkk nkn nkr nks nku nnb nni nnk nnn nns nnu nrb nri nrk nrn nrr nrs nru nsb nsi nsk nsn nsr nss nsu nub nui nuk nun nur nus nuu rbb rbi rbk rbn rbr rbs rbu rib rii rik rin rir ris rkb rkk rks rku rnb rni rnn rnr rns rnu rrb rri rrk rrn rrr rrs rru rsb rsi rsk rsn rsr rss rsu rub rui ruk run rur rus ruu sbb sbi sbk sbn sbr sbs sbu sib sii sik sin sir sis siu sk- skb ski skk skr sks sku snb sni snk snn snr sns snu sr- srb sri srk srn srr srs ss- ssb ssi ssk ssn ssr sss ssu sub sui suk sun sur sus suu ubb ubi ubk ubn ubr ubs ubu uib uii uin uir uis uiu ukb uki ukk ukn ukr uku un- unb uni unk unn unr uns unu ur- urb uri urk urn urr urs uru usb usi usk usn usr uss usu uun uur uus uuu