-er bbb bbd bbe bbg bbi bbk bbl bbr bbs bdb bdd bde bdg bdi bdk bdl bdr bds be- beb bed bee beg bei bek bel ber bes bgb bgd bge bgg bgi bgk bgl bgr bgs bi- bib bid bie big bii bik bil bir bis bkb bke bkg bkk bkl bkr bks blb bld ble blg bli blk bll blr bls brb brd bre brg bri brk brl brr brs bsb bsd bse bsg bsi bsk bsl bsr bss dbb dbd dbe dbg dbi dbk dbl dbr dbs ddb ddd dde ddg ddi ddk ddl ddr dds de- deb ded dee deg dei dek del der des dgd dge dgg dgi dgk dgl dgr dgs di- dib did die dig dii dik dil dir dis dkb dke dkg dki dkk dkl dkr dks dl- dlb dld dle dlg dli dlk dll dlr dls drb drd dre drg dri drk drl drr drs dsb dsd dse dsg dsi dsk dsl dsr dss ebb ebd ebe ebg ebi ebk ebl ebr ebs ed- edb edd ede edg edi edk edl edr eds eeb eed eee eeg eek eel eer ees egb egd ege egg egi egl egr egs eib eid eie eig eii eik eil eir eis ekb ekd eke ekg eki ekl ekr eks elb eld ele elg eli elk ell elr els erb erd ere erg eri erk erl err ers es- esb esd ese esg esi esk esl esr ess g-d gbd gbe gbg gbi gbk gbl gbr gbs gdb gdd gde gdi gdk gdl gdr gds ge- geb ged gee geg gei gek gel ger ges ggb ggd ggg ggi ggr ggs gib gid gie gig gii gik gil gir gis gkb gkd gks glb gld gle glg gli glk gll glr gls grb grd gre grg gri grk grl grr grs gsb gsd gse gsg gsi gsk gsl gsr gss i-d ibb ibd ibe ibg ibi ibk ibl ibr ibs idb idd ide idg idi idk idl idr ids ie- ied iee ieg iei iek iel ier ies igb igd ige igg igi igk igl igr igs iib iid iie iii iil iir iis ikb ike iki ikk ikl ikr iks il- ilb ild ile ilg ili ilk ill ilr ils ir- irb ird ire irg iri irk irl irr irs is- isb isd ise isg isi isk isl isr iss kbb kbd kbe kbi kbk kbl kbr kbs kdb kde kdg kdk kdl kdr kds ke- keb ked kee keg kei kek kel ker kes kgb kgd kgi kgl kgs kib kid kie kig kii kik kil kir kis kkb kke kki kkk kkl kkr kks kl- klb kld klg kli klr kls krd krg kri krk krl krr krs ksb ksd kse ksg ksi ksk ksl ksr kss lbb lbd lbe lbg lbi lbk lbl lbr lbs ldb ldd lde ldg ldi ldk ldl ldr lds leb led lee leg lei lek lel ler les lgb lgd lge lgg lgi lgk lgl lgr lgs lib lid lie lig lii lik lil lir lis lkb lkg lkl lkr lks llb lld lle llg lli llk lll llr lls lrb lrd lrg lri lrk lrr lrs lsb lsd lse lsg lsi lsk lsl lsr lss rbb rbd rbe rbg rbi rbk rbl rbr rbs rdb rdd rde rdg rdi rdl rdr rds re- reb red ree reg rei rek rel rer res rgb rgd rge rgg rgi rgk rgr rgs rib rid rie rig rii rik ril rir ris rkb rke rkg rkk rks rld rle rlg rli rll rlr rls rrb rrd rrg rri rrk rrl rrr rrs rsb rsd rse rsg rsi rsk rsl rsr rss sbb sbd sbe sbg sbi sbk sbl sbr sbs sdb sdd sde sdg sdi sdk sdl sdr sds se- seb sed see seg sei sek sel ser ses sgb sgd sge sgg sgi sgk sgl sgr sgs sib sid sie sig sii sik sil sir sis sk- skb skd ske skg ski skk skl skr sks slb sld sle slg sli slk sll slr sls sr- srb srd sre srg sri srk srl srr srs ss- ssb ssd sse ssg ssi ssk ssl ssr sss