-er bbb bbd bbe bbf bbg bbi bbk bbo bbr bbs bdb bdd bde bdf bdg bdi bdk bdo bdr bds be- beb bed bee bef beg bei bek beo ber bes bfb bfd bfe bff bfg bfi bfo bfr bfs bgb bgd bge bgf bgg bgi bgk bgo bgr bgs bi- bib bid bie bif big bii bik bio bir bis bkb bke bkf bkg bkk bko bkr bks bob bod boe bof bog boi bok boo bor bos brb brd bre brf brg bri brk bro brr brs bsb bsd bse bsf bsg bsi bsk bso bsr bss dbb dbd dbe dbf dbg dbi dbk dbo dbr dbs ddb ddd dde ddf ddg ddi ddk ddo ddr dds de- deb ded dee def deg dei dek deo der des dfb dfd dfe dff dfg dfi dfk dfo dfr dfs dgd dge dgf dgg dgi dgk dgr dgs di- dib did die dif dig dii dik dio dir dis dkb dke dkg dki dkk dko dkr dks dob dod doe dof dog doi dok doo dor dos drb drd dre drg dri drk dro drr drs dsb dsd dse dsf dsg dsi dsk dso dsr dss ebb ebd ebe ebf ebg ebi ebk ebo ebr ebs ed- edb edd ede edf edg edi edk edo edr eds eeb eed eee eef eeg eek eeo eer ees ef- efb efd efe eff efg efi efo efr efs egb egd ege egf egg egi ego egr egs eib eid eie eif eig eii eik eio eir eis ekb ekd eke ekf ekg eki eko ekr eks eo- eob eod eoe eof eog eoi eok eoo eor eos erb erd ere erf erg eri erk ero err ers es- esb esd ese esf esg esi esk eso esr ess fbb fbd fbe fbf fbg fbi fbk fbo fbr fbs fdb fdd fde fdf fdg fdi fdk fdo fdr fds feb fed fee fef feg fei fek feo fer fes ffd ffe fff ffg ffi ffk ffo ffr ffs fgb fgd fge fgf fgg fgi fgr fgs fib fid fie fif fig fii fik fir fis fkb fkf fkg fki fkk fob foe fof fog foi fok foo for fos frb frd fre frf frg fri frk fro frr frs fsb fsd fse fsf fsg fsi fsk fso fsr fss g-d gbd gbe gbf gbg gbi gbk gbo gbr gbs gdb gdd gde gdf gdi gdk gdo gdr gds ge- geb ged gee gef geg gei gek geo ger ges gfb gfd gfe gff gfi gfk gfo gfr gfs ggb ggd ggg ggi ggo ggr ggs gib gid gie gif gig gii gik gio gir gis gkb gkd gko gks gob god goe gof gog goi gok goo gor gos grb grd gre grf grg gri grk gro grr grs gsb gsd gse gsf gsg gsi gsk gso gsr gss i-d i-f ibb ibd ibe ibf ibg ibi ibk ibo ibr ibs idb idd ide idf idg idi idk ido idr ids ie- ied iee ief ieg iei iek ier ies ifb ifd ife iff ifg ifi ifo ifr ifs igb igd ige igf igg igi igk igo igr igs iib iid iie iif iii iio iir iis ikb ike ikf iki ikk iko ikr iks io- iob iod ioe iof iog ioi ioo ior ios ir- irb ird ire irf irg iri irk iro irr irs is- isb isd ise isf isg isi isk iso isr iss kbb kbd kbe kbf kbi kbk kbo kbr kbs kdb kde kdf kdg kdk kdo kdr kds ke- keb ked kee kef keg kei kek keo ker kes kfd kff kfg kfi kfo kfs kgb kgd kgf kgi kgo kgs kib kid kie kif kig kii kik kio kir kis kkb kke kki kkk kkr kks kob kod koe kof kog koi kok koo kor kos krd krf krg kri krk kro krr krs ksb ksd kse ksf ksg ksi ksk kso ksr kss o-i ob- obb obd obe obf obg obi obk obo obr obs odb odd ode odf odg odi odo odr ods oeb oed oee oef oeg oei oeo oer oes of- ofb ofd ofe off ofg ofi ofo ofr ofs ogd oge ogf ogg ogi ogo ogs oib oid oie oif oii oik oio oir ois okb okd oke okg oki okk oko okr oks oo- oob ood oof oog ooi ook ooo oor oos or- orb ord ore orf org ori ork oro orr ors os- osb osd ose osf osg osi osk oso osr oss rbb rbd rbe rbf rbg rbi rbk rbo rbr rbs rdb rdd rde rdf rdg rdi rdo rdr rds re- reb red ree ref reg rei rek reo rer res rfb rfd rfe rff rfg rfi rfk rfo rfr rfs rgb rgd rge rgf rgg rgi rgk rgo rgr rgs rib rid rie rif rig rii rik rio rir ris rkb rke rkf rkg rkk rko rks rob rod roe rof rog roi rok roo ror ros rrb rrd rrf rrg rri rrk rrr rrs rsb rsd rse rsf rsg rsi rsk rso rsr rss sbb sbd sbe sbf sbg sbi sbk sbo sbr sbs sdb sdd sde sdf sdg sdi sdk sdo sdr sds se- seb sed see sef seg sei sek seo ser ses sfb sfd sfe sff sfg sfi sfk sfo sfr sfs sgb sgd sge sgf sgg sgi sgk sgo sgr sgs sib sid sie sif sig sii sik sio sir sis sk- skb skd ske skf skg ski skk sko skr sks sob sod soe sof sog soi sok soo sor sos sr- srb srd sre srf srg sri srk sro srr srs ss- ssb ssd sse ssf ssg ssi ssk sso ssr sss