-ol bbb bbg bbi bbl bbn bbo bbr bbs bgb bgg bgi bgl bgn bgo bgr bgs bi- bib big bii bil bin bio bir bis blb blg bli bll bln blo blr bls bnb bng bni bnl bnn bno bnr bns bob bog boi bol bon boo bor bos brb brg bri brl brn bro brr brs bsb bsg bsi bsl bsn bso bsr bss gbg gbi gbl gbn gbo gbr gbs ggb ggg ggi ggn ggo ggr ggs gib gig gii gil gin gio gir gis glb glg gli gll gln glo glr gls gnb gni gnl gnn gno gnr gns gob gog goi gol gon goo gor gos grb grg gri grl grn gro grr grs gsb gsg gsi gsl gsn gso gsr gss ibb ibg ibi ibl ibn ibo ibr ibs igb igg igi igl ign igo igr igs iib iii iil iin iio iir iis il- ilb ilg ili ill iln ilo ilr ils in- inb ing ini inl inn ino inr ins io- iob iog ioi iol ion ioo ior ios ir- irb irg iri irl irn iro irr irs is- isb isg isi isl isn iso isr iss lbb lbg lbi lbl lbo lbr lbs lgb lgg lgi lgl lgn lgo lgr lgs lib lig lii lil lin lio lir lis llb llg lli lll lln llo llr lls lnb lng lni lnl lnn lno lnr lns lob log loi lol lon loo lor los lrb lrg lri lrn lro lrr lrs lsb lsg lsi lsl lsn lso lsr lss n-i nbb nbg nbi nbl nbn nbo nbr nbs ngb ngg ngi ngl ngn ngo ngs nib nig nii nil nin nio nir nis nlb nlg nli nll nln nlo nlr nls nnb nng nni nnl nnn nno nns no- nob nog noi nol non noo nor nos nrb nrg nri nrl nrn nro nrr nrs nsb nsg nsi nsl nsn nso nsr nss o-i ob- obb obg obi obl obn obo obr obs ogg ogi ogl ogn ogo ogs oib oii oil oin oio oir ois olb olg oli oll oln olo ols on- onb ong oni onl onn ono onr ons oo- oob oog ooi ool oon ooo oor oos or- orb org ori orl orn oro orr ors os- osb osg osi osl osn oso osr oss rbb rbg rbi rbl rbn rbo rbr rbs rgb rgg rgi rgn rgo rgr rgs rib rig rii ril rin rio rir ris rlg rli rll rln rlo rlr rls rnb rng rni rnn rno rnr rns rob rog roi rol ron roo ror ros rrb rrg rri rrl rrn rrr rrs rsb rsg rsi rsl rsn rso rsr rss sbb sbg sbi sbl sbn sbo sbr sbs sgb sgg sgi sgl sgn sgo sgr sgs sib sig sii sil sin sio sir sis slb slg sli sll sln slo slr sls snb sng sni snl snn sno snr sns sob sog soi sol son soo sor sos sr- srb srg sri srl srn sro srr srs ss- ssb ssg ssi ssl ssn sso ssr sss