b-u bbb bbi bbk bbn bbr bbs bbu bi- bib bii bik bin bir bis biu biv bkb bkk bkn bkr bks bkv bnb bni bnk bnn bnr bns bnu bnv brb bri brk brn brr brs bru brv bsb bsi bsk bsn bsr bss bsu bsv bub bui buk bun bur bus buu bvb bvi bvk bvn bvr bvs bvu bvv i-v ibb ibi ibk ibn ibr ibs ibu ibv iib iii iin iir iis iiu ikb iki ikk ikr iks iku ikv in- inb ini ink inn inr ins inu inv ir- irb iri irk irn irr irs iru irv is- isb isi isk isn isr iss isu isv iu- iub iui iur ius ivb ivi ivr ivs ivu ivv kbb kbi kbk kbn kbr kbs kbu kib kii kik kin kir kis kiu kiv kkb kki kkk kkn kkr kks kku kkv kn- kni knk knn knr knu kri krk krn krr krs kru krv ksb ksi ksk ksn ksr kss ksu ksv kub kui kuk kun kur kus kuu kvb kvi kvk kvn kvr kvs kvv n-i nbb nbi nbk nbn nbr nbs nbu nbv nib nii nik nin nir nis niu niv nki nkk nkn nkr nks nku nnb nni nnk nnn nns nnu nnv nrb nri nrk nrn nrr nrs nru nrv nsb nsi nsk nsn nsr nss nsu nsv nub nui nuk nun nur nus nuu nuv nvb nvi nvk nvn nvu nvv rbb rbi rbk rbn rbr rbs rbu rib rii rik rin rir ris riv rkb rkk rks rku rkv rnb rni rnn rnr rns rnu rnv rrb rri rrk rrn rrr rrs rru rsb rsi rsk rsn rsr rss rsu rsv rub rui ruk run rur rus ruu ruv rvb rvi rvn rvr rvs rvu rvv sbb sbi sbk sbn sbr sbs sbu sbv sib sii sik sin sir sis siu siv sk- skb ski skk skr sks sku snb sni snk snn snr sns snu snv sr- srb sri srk srn srr srs srv ss- ssb ssi ssk ssn ssr sss ssu ssv sub sui suk sun sur sus suu suv svb svi svk svn svr svs svu svv ubb ubi ubk ubn ubr ubs ubu ubv uib uii uin uir uis uiu ukb uki ukk ukn ukr uku un- unb uni unk unn unr uns unu unv ur- urb uri urk urn urr urs uru usb usi usk usn usr uss usu usv uun uur uus uuu uvb uvs uvu uvv vbi vbk vbr vbs vbv vi- vib vii vik vin vir vis viu viv vkb vn- vni vnr vns vnu vnv vrb vri vrk vrn vrr vrs vru vsb vsi vsk vsn vsr vss vsu vsv vuk vur vus vuv vvb vvi vvr vvs vvv