-er bbb bbe bbf bbg bbi bbn bbo bbr bbs be- beb bee bef beg bei ben beo ber bes bfb bfe bff bfg bfi bfn bfo bfr bfs bgb bge bgf bgg bgi bgn bgo bgr bgs bi- bib bie bif big bii bin bio bir bis bnb bne bnf bng bni bnn bno bnr bns bob boe bof bog boi bon boo bor bos brb bre brf brg bri brn bro brr brs bsb bse bsf bsg bsi bsn bso bsr bss ebb ebe ebf ebg ebi ebn ebo ebr ebs eeb eee eef eeg een eeo eer ees ef- efb efe eff efg efi efo efr efs egb ege egf egg egi egn ego egr egs eib eie eif eig eii ein eio eir eis en- enb ene enf eng eni enn eno enr ens eo- eob eoe eof eog eoi eon eoo eor eos erb ere erf erg eri ern ero err ers es- esb ese esf esg esi esn eso esr ess fbb fbe fbf fbg fbi fbn fbo fbr fbs feb fee fef feg fei fen feo fer fes ffe fff ffg ffi ffn ffo ffr ffs fgb fge fgf fgg fgi fgn fgr fgs fib fie fif fig fii fin fir fis fnb fne fnf fng fni fnn fnr fns fob foe fof fog foi fon foo for fos frb fre frf frg fri frn fro frr frs fsb fse fsf fsg fsi fsn fso fsr fss gbe gbf gbg gbi gbn gbo gbr gbs ge- geb gee gef geg gei gen geo ger ges gfb gfe gff gfi gfo gfr gfs ggb ggg ggi ggn ggo ggr ggs gib gie gif gig gii gin gio gir gis gnb gne gnf gni gnn gno gnr gns gob goe gof gog goi gon goo gor gos grb gre grf grg gri grn gro grr grs gsb gse gsf gsg gsi gsn gso gsr gss i-f ibb ibe ibf ibg ibi ibn ibo ibr ibs ie- iee ief ieg iei ien ier ies ifb ife iff ifg ifi ifn ifo ifr ifs igb ige igf igg igi ign igo igr igs iib iie iif iii iin iio iir iis in- inb ine inf ing ini inn ino inr ins io- iob ioe iof iog ioi ion ioo ior ios ir- irb ire irf irg iri irn iro irr irs is- isb ise isf isg isi isn iso isr iss n-i nbb nbe nbf nbg nbi nbn nbo nbr nbs ne- neb nee nef neg nei nen neo ner nes nfb nfe nff nfi nfn nfo nfr nfs ngb nge ngf ngg ngi ngn ngo ngs nib nie nif nig nii nin nio nir nis nnb nne nnf nng nni nnn nno nns no- nob noe nof nog noi non noo nor nos nrb nre nrf nrg nri nrn nro nrr nrs nsb nse nsf nsg nsi nsn nso nsr nss o-i ob- obb obe obf obg obi obn obo obr obs oeb oee oef oeg oei oen oeo oer oes of- ofb ofe off ofg ofi ofn ofo ofr ofs oge ogf ogg ogi ogn ogo ogs oib oie oif oii oin oio oir ois on- onb one onf ong oni onn ono onr ons oo- oob oof oog ooi oon ooo oor oos or- orb ore orf org ori orn oro orr ors os- osb ose osf osg osi osn oso osr oss rbb rbe rbf rbg rbi rbn rbo rbr rbs re- reb ree ref reg rei ren reo rer res rfb rfe rff rfg rfi rfn rfo rfr rfs rgb rge rgf rgg rgi rgn rgo rgr rgs rib rie rif rig rii rin rio rir ris rnb rng rni rnn rno rnr rns rob roe rof rog roi ron roo ror ros rrb rrf rrg rri rrn rrr rrs rsb rse rsf rsg rsi rsn rso rsr rss sbb sbe sbf sbg sbi sbn sbo sbr sbs se- seb see sef seg sei sen seo ser ses sfb sfe sff sfg sfi sfn sfo sfr sfs sgb sge sgf sgg sgi sgn sgo sgr sgs sib sie sif sig sii sin sio sir sis snb sne snf sng sni snn sno snr sns sob soe sof sog soi son soo sor sos sr- srb sre srf srg sri srn sro srr srs ss- ssb sse ssf ssg ssi ssn sso ssr sss