-er b-p bbb bbe bbg bbi bbl bbp bbr bbs be- beb bee beg bei bel bep ber bes bgb bge bgg bgi bgl bgp bgr bgs bi- bib bie big bii bil bip bir bis blb ble blg bli bll blp blr bls bpb bpe bpg bpi bpl bpp bpr bps brb bre brg bri brl brp brr brs bsb bse bsg bsi bsl bsp bsr bss ebb ebe ebg ebi ebl ebp ebr ebs eeb eee eeg eel eep eer ees egb ege egg egi egl egp egr egs eib eie eig eii eil eip eir eis elb ele elg eli ell elp elr els ep- epb epe epg epi epl epp epr eps erb ere erg eri erl erp err ers es- esb ese esg esi esl esp esr ess g-p gbe gbg gbi gbl gbp gbr gbs ge- geb gee geg gei gel gep ger ges ggb ggg ggi ggp ggr ggs gib gie gig gii gil gip gir gis glb gle glg gli gll glp glr gls gpb gpe gpg gpi gpl gpp gpr gps grb gre grg gri grl grp grr grs gsb gse gsg gsi gsl gsp gsr gss ibb ibe ibg ibi ibl ibp ibr ibs ie- iee ieg iei iel iep ier ies igb ige igg igi igl igp igr igs iib iie iii iil iip iir iis il- ilb ile ilg ili ill ilp ilr ils ipb ipe ipg ipi ipl ipp ipr ips ir- irb ire irg iri irl irp irr irs is- isb ise isg isi isl isp isr iss l-p lbb lbe lbg lbi lbl lbp lbr lbs leb lee leg lei lel lep ler les lgb lge lgg lgi lgl lgp lgr lgs lib lie lig lii lil lip lir lis llb lle llg lli lll llp llr lls lpb lpe lpg lpi lpl lpp lpr lps lrb lrg lri lrp lrr lrs lsb lse lsg lsi lsl lsp lsr lss p-p pbb pbe pbg pbi pbl pbp pbr pbs peb pee peg pei pel pep per pes pgb pge pgg pgi pgl pgp pgr pgs pib pie pig pii pil pip pir pis plb ple plg pli pll plp plr pls ppb ppe ppg ppi ppl ppp ppr pps prb pre prg pri prl prp prr prs ps- psb pse psg psi psl psp psr pss rbb rbe rbg rbi rbl rbp rbr rbs re- reb ree reg rei rel rep rer res rgb rge rgg rgi rgp rgr rgs rib rie rig rii ril rip rir ris rle rlg rli rll rlp rlr rls rpb rpe rpg rpi rpl rpp rpr rps rrb rrg rri rrl rrp rrr rrs rsb rse rsg rsi rsl rsp rsr rss sbb sbe sbg sbi sbl sbp sbr sbs se- seb see seg sei sel sep ser ses sgb sge sgg sgi sgl sgp sgr sgs sib sie sig sii sil sip sir sis slb sle slg sli sll slp slr sls spb spe spg spi spl spp spr sps sr- srb sre srg sri srl srp srr srs ss- ssb sse ssg ssi ssl ssp ssr sss