bbb bbi bbk bbn bbo bbr bbs bi- bib bii bik bin bio bir bis biv bkb bkk bkn bko bkr bks bkv bnb bni bnk bnn bno bnr bns bnv bob boi bok bon boo bor bos bov brb bri brk brn bro brr brs brv bsb bsi bsk bsn bso bsr bss bsv bvb bvi bvk bvn bvo bvr bvs bvv i-v ibb ibi ibk ibn ibo ibr ibs ibv iib iii iin iio iir iis ikb iki ikk iko ikr iks ikv in- inb ini ink inn ino inr ins inv io- iob ioi ion ioo ior ios iov ir- irb iri irk irn iro irr irs irv is- isb isi isk isn iso isr iss isv ivb ivi ivo ivr ivs ivv kbb kbi kbk kbn kbo kbr kbs kib kii kik kin kio kir kis kiv kkb kki kkk kkn kkr kks kkv kn- kni knk knn kno knr kob koi kok kon koo kor kos kri krk krn kro krr krs krv ksb ksi ksk ksn kso ksr kss ksv kvb kvi kvk kvn kvo kvr kvs kvv n-i nbb nbi nbk nbn nbo nbr nbs nbv nib nii nik nin nio nir nis niv nki nkk nkn nko nkr nks nnb nni nnk nnn nno nns nnv no- nob noi nok non noo nor nos nov nrb nri nrk nrn nro nrr nrs nrv nsb nsi nsk nsn nso nsr nss nsv nvb nvi nvk nvn nvv o-i ob- obb obi obk obn obo obr obs obv oib oii oik oin oio oir ois oiv okb oki okk oko okr oks on- onb oni onk onn ono onr ons oo- oob ooi ook oon ooo oor oos oov or- orb ori ork orn oro orr ors orv os- osb osi osk osn oso osr oss osv ov- ovb ovi ovo ovs ovv rbb rbi rbk rbn rbo rbr rbs rib rii rik rin rio rir ris riv rkb rkk rko rks rkv rnb rni rnn rno rnr rns rnv rob roi rok ron roo ror ros rov rrb rri rrk rrn rrr rrs rsb rsi rsk rsn rso rsr rss rsv rvb rvi rvn rvo rvr rvs rvv sbb sbi sbk sbn sbo sbr sbs sbv sib sii sik sin sio sir sis siv sk- skb ski skk sko skr sks snb sni snk snn sno snr sns snv sob soi sok son soo sor sos sov sr- srb sri srk srn sro srr srs srv ss- ssb ssi ssk ssn sso ssr sss ssv svb svi svk svn svo svr svs svv vbi vbk vbo vbr vbs vbv vi- vib vii vik vin vio vir vis viv vkb vn- vni vno vnr vns vnv vob voi vok von voo vor vos vov vrb vri vrk vrn vrr vrs vsb vsi vsk vsn vso vsr vss vsv vvb vvi vvo vvr vvs vvv