-ol bbb bbf bbg bbi bbl bbn bbo bbr bbs bfb bff bfg bfi bfl bfn bfo bfr bfs bgb bgf bgg bgi bgl bgn bgo bgr bgs bi- bib bif big bii bil bin bio bir bis blb blf blg bli bll bln blo blr bls bnb bnf bng bni bnl bnn bno bnr bns bob bof bog boi bol bon boo bor bos brb brf brg bri brl brn bro brr brs bsb bsf bsg bsi bsl bsn bso bsr bss fbb fbf fbg fbi fbl fbn fbo fbr fbs fff ffg ffi ffl ffn ffo ffr ffs fgb fgf fgg fgi fgl fgn fgr fgs fib fif fig fii fil fin fir fis flb flf flg fli fll fln flo flr fls fnb fnf fng fni fnl fnn fnr fns fob fof fog foi fol fon foo for fos frb frf frg fri frl frn fro frr frs fsb fsf fsg fsi fsl fsn fso fsr fss gbf gbg gbi gbl gbn gbo gbr gbs gfb gff gfi gfl gfo gfr gfs ggb ggg ggi ggn ggo ggr ggs gib gif gig gii gil gin gio gir gis glb glf glg gli gll gln glo glr gls gnb gnf gni gnl gnn gno gnr gns gob gof gog goi gol gon goo gor gos grb grf grg gri grl grn gro grr grs gsb gsf gsg gsi gsl gsn gso gsr gss i-f ibb ibf ibg ibi ibl ibn ibo ibr ibs ifb iff ifg ifi ifl ifn ifo ifr ifs igb igf igg igi igl ign igo igr igs iib iif iii iil iin iio iir iis il- ilb ilf ilg ili ill iln ilo ilr ils in- inb inf ing ini inl inn ino inr ins io- iob iof iog ioi iol ion ioo ior ios ir- irb irf irg iri irl irn iro irr irs is- isb isf isg isi isl isn iso isr iss lbb lbf lbg lbi lbl lbo lbr lbs lfb lff lfg lfi lfl lfn lfo lfr lfs lgb lgf lgg lgi lgl lgn lgo lgr lgs lib lif lig lii lil lin lio lir lis llb llf llg lli lll lln llo llr lls lnb lng lni lnl lnn lno lnr lns lob lof log loi lol lon loo lor los lrb lrf lrg lri lrn lro lrr lrs lsb lsf lsg lsi lsl lsn lso lsr lss n-i nbb nbf nbg nbi nbl nbn nbo nbr nbs nfb nff nfi nfl nfn nfo nfr nfs ngb ngf ngg ngi ngl ngn ngo ngs nib nif nig nii nil nin nio nir nis nlb nlf nlg nli nll nln nlo nlr nls nnb nnf nng nni nnl nnn nno nns no- nob nof nog noi nol non noo nor nos nrb nrf nrg nri nrl nrn nro nrr nrs nsb nsf nsg nsi nsl nsn nso nsr nss o-i ob- obb obf obg obi obl obn obo obr obs of- ofb off ofg ofi ofl ofn ofo ofr ofs ogf ogg ogi ogl ogn ogo ogs oib oif oii oil oin oio oir ois olb olf olg oli oll oln olo ols on- onb onf ong oni onl onn ono onr ons oo- oob oof oog ooi ool oon ooo oor oos or- orb orf org ori orl orn oro orr ors os- osb osf osg osi osl osn oso osr oss rbb rbf rbg rbi rbl rbn rbo rbr rbs rfb rff rfg rfi rfl rfn rfo rfr rfs rgb rgf rgg rgi rgn rgo rgr rgs rib rif rig rii ril rin rio rir ris rlf rlg rli rll rln rlo rlr rls rnb rng rni rnn rno rnr rns rob rof rog roi rol ron roo ror ros rrb rrf rrg rri rrl rrn rrr rrs rsb rsf rsg rsi rsl rsn rso rsr rss sbb sbf sbg sbi sbl sbn sbo sbr sbs sfb sff sfg sfi sfl sfn sfo sfr sfs sgb sgf sgg sgi sgl sgn sgo sgr sgs sib sif sig sii sil sin sio sir sis slb slf slg sli sll sln slo slr sls snb snf sng sni snl snn sno snr sns sob sof sog soi sol son soo sor sos sr- srb srf srg sri srl srn sro srr srs ss- ssb ssf ssg ssi ssl ssn sso ssr sss