-er b-p bbb bbd bbe bbg bbi bbk bbp bbr bbs bdb bdd bde bdg bdi bdk bdp bdr bds be- beb bed bee beg bei bek bep ber bes bgb bgd bge bgg bgi bgk bgp bgr bgs bi- bib bid bie big bii bik bip bir bis bkb bke bkg bkk bkp bkr bks bpb bpd bpe bpg bpi bpp bpr bps brb brd bre brg bri brk brp brr brs bsb bsd bse bsg bsi bsk bsp bsr bss dbb dbd dbe dbg dbi dbk dbp dbr dbs ddb ddd dde ddg ddi ddk ddp ddr dds de- deb ded dee deg dei dek dep der des dgd dge dgg dgi dgk dgp dgr dgs di- dib did die dig dii dik dip dir dis dkb dke dkg dki dkk dkp dkr dks dpb dpd dpe dpg dpi dpk dpp dpr dps drb drd dre drg dri drk drp drr drs dsb dsd dse dsg dsi dsk dsp dsr dss ebb ebd ebe ebg ebi ebk ebp ebr ebs ed- edb edd ede edg edi edk edp edr eds eeb eed eee eeg eek eep eer ees egb egd ege egg egi egp egr egs eib eid eie eig eii eik eip eir eis ekb ekd eke ekg eki ekp ekr eks ep- epb epd epe epg epi epp epr eps erb erd ere erg eri erk erp err ers es- esb esd ese esg esi esk esp esr ess g-d g-p gbd gbe gbg gbi gbk gbp gbr gbs gdb gdd gde gdi gdk gdp gdr gds ge- geb ged gee geg gei gek gep ger ges ggb ggd ggg ggi ggp ggr ggs gib gid gie gig gii gik gip gir gis gkb gkd gkp gks gpb gpd gpe gpg gpi gpk gpp gpr gps grb grd gre grg gri grk grp grr grs gsb gsd gse gsg gsi gsk gsp gsr gss i-d ibb ibd ibe ibg ibi ibk ibp ibr ibs idb idd ide idg idi idk idp idr ids ie- ied iee ieg iei iek iep ier ies igb igd ige igg igi igk igp igr igs iib iid iie iii iip iir iis ikb ike iki ikk ikr iks ipb ipd ipe ipg ipi ipp ipr ips ir- irb ird ire irg iri irk irp irr irs is- isb isd ise isg isi isk isp isr iss kbb kbd kbe kbi kbk kbp kbr kbs kdb kde kdg kdk kdp kdr kds ke- keb ked kee keg kei kek kep ker kes kgb kgd kgi kgp kgs kib kid kie kig kii kik kip kir kis kkb kke kki kkk kkp kkr kks kpd kpe kpi kpk kpp kpr kps krd krg kri krk krp krr krs ksb ksd kse ksg ksi ksk ksp ksr kss p-p pbb pbd pbe pbg pbi pbk pbp pbr pbs pdb pdd pde pdg pdi pdk pdp pdr pds peb ped pee peg pei pek pep per pes pgb pgd pge pgg pgi pgk pgp pgr pgs pib pid pie pig pii pik pip pir pis pkb pkd pke pkg pki pkp pkr pks ppb ppd ppe ppg ppi ppk ppp ppr pps prb prd pre prg pri prk prp prr prs ps- psb psd pse psg psi psk psp psr pss rbb rbd rbe rbg rbi rbk rbp rbr rbs rdb rdd rde rdg rdi rdp rdr rds re- reb red ree reg rei rek rep rer res rgb rgd rge rgg rgi rgk rgp rgr rgs rib rid rie rig rii rik rip rir ris rkb rke rkg rkk rkp rks rpb rpd rpe rpg rpi rpk rpp rpr rps rrb rrd rrg rri rrk rrp rrr rrs rsb rsd rse rsg rsi rsk rsp rsr rss sbb sbd sbe sbg sbi sbk sbp sbr sbs sdb sdd sde sdg sdi sdk sdp sdr sds se- seb sed see seg sei sek sep ser ses sgb sgd sge sgg sgi sgk sgp sgr sgs sib sid sie sig sii sik sip sir sis sk- skb skd ske skg ski skk skp skr sks spb spd spe spg spi spk spp spr sps sr- srb srd sre srg sri srk srp srr srs ss- ssb ssd sse ssg ssi ssk ssp ssr sss