bbb bbi bbn bbo bbr bbs bi- bib bii bin bio bir bis biv bnb bni bnn bno bnr bns bnv bob boi bon boo bor bos bov brb bri brn bro brr brs brv bsb bsi bsn bso bsr bss bsv bvb bvi bvn bvo bvr bvs bvv i-v ibb ibi ibn ibo ibr ibs ibv iib iii iin iio iir iis in- inb ini inn ino inr ins inv io- iob ioi ion ioo ior ios iov ir- irb iri irn iro irr irs irv is- isb isi isn iso isr iss isv ivb ivi ivo ivr ivs ivv n-i nbb nbi nbn nbo nbr nbs nbv nib nii nin nio nir nis niv nnb nni nnn nno nns nnv no- nob noi non noo nor nos nov nrb nri nrn nro nrr nrs nrv nsb nsi nsn nso nsr nss nsv nvb nvi nvn nvv o-i ob- obb obi obn obo obr obs obv oib oii oin oio oir ois oiv on- onb oni onn ono onr ons oo- oob ooi oon ooo oor oos oov or- orb ori orn oro orr ors orv os- osb osi osn oso osr oss osv ov- ovb ovi ovo ovs ovv rbb rbi rbn rbo rbr rbs rib rii rin rio rir ris riv rnb rni rnn rno rnr rns rnv rob roi ron roo ror ros rov rrb rri rrn rrr rrs rsb rsi rsn rso rsr rss rsv rvb rvi rvn rvo rvr rvs rvv sbb sbi sbn sbo sbr sbs sbv sib sii sin sio sir sis siv snb sni snn sno snr sns snv sob soi son soo sor sos sov sr- srb sri srn sro srr srs srv ss- ssb ssi ssn sso ssr sss ssv svb svi svn svo svr svs svv vbi vbo vbr vbs vbv vi- vib vii vin vio vir vis viv vn- vni vno vnr vns vnv vob voi von voo vor vos vov vrb vri vrn vrr vrs vsb vsi vsn vso vsr vss vsv vvb vvi vvo vvr vvs vvv