-er c-- ccc ccd cce ccg cco ccp ccr ccz cdc cdd cde cdg cdo cdp cdr cdz ce- cec ced cee ceg ceo cep cer cez cgc cgd cge cgg cgo cgp cgr co- coc cod coe cog coo cop cor coz cpc cpd cpe cpg cpo cpp cpr cpz crc crd cre crg cro crp crr crz cz- czc czd cze czo dcc dcd dce dcg dco dcp dcr ddc ddd dde ddg ddo ddp ddr ddz de- dec ded dee deg deo dep der dez dgc dgd dge dgg dgp dgr dgz doc dod doe dog doo dop dor doz dpc dpd dpe dpg dpo dpp dpr dpz drc drd dre drg dro drp drr drz dzd dze dzo dzp dzr ec- ecc ecd ece ecg eco ecr ed- edc edd ede edg edo edp edr eec eed eee eeg eeo eep eer egc egd ege egg ego egp egr eo- eoc eod eoe eog eoo eop eor ep- epc epd epe epg epo epp epr epz erc erd ere erg ero erp err erz eze ezo ezr ezz g-d g-p gcc gcd gce gcg gco gcp gcr gdc gdd gde gdo gdp gdr ge- gec ged gee geg geo gep ger gez ggc ggd ggg ggo ggp ggr ggz goc god goe gog goo gop gor goz gpc gpd gpe gpg gpo gpp gpr gpz grc grd gre grg gro grp grr gzo gzp gzr oc- occ ocd ocg oco ocp ocr ocz odc odd ode odg odo odp odr oec oed oee oeg oeo oep oer ogc ogd oge ogg ogo ogp oo- ooc ood oog ooo oop oor op- opc opd ope opg opo opp opr or- orc ord ore org oro orp orr orz oze ozo ozz p-p pcc pcd pce pcg pco pcp pcr pdc pdd pde pdg pdo pdp pdr pdz pec ped pee peg peo pep per pez pgc pgd pge pgg pgo pgp pgr poc pod poe pog poo pop por poz ppc ppd ppe ppg ppo ppp ppr ppz prc prd pre prg pro prp prr prz pzc pzp rcc rcd rce rcg rco rcp rcr rdc rdd rde rdg rdo rdp rdr re- rec red ree reg reo rep rer rez rgc rgd rge rgg rgo rgp rgr roc rod roe rog roo rop ror roz rpc rpd rpe rpg rpo rpp rpr rpz rrc rrd rrg rrp rrr rze rzo z-g zce zco zec zed zee zeo zep zer zez zgg zo- zoc zod zoe zog zoo zor zpc zpe zpg zpo zpp zpr zro zrp zzr zzz