a-a a-c aaa aac aad aae aag aao aap ac- aca acc acd ace acg aco acp ad- ada adc add ade adg ado adp aea aec aed aee aeg aeo aep ag- aga agc agd age agg ago agp aoa aoc aod aoe aog aoo aop ap- apa apc apd ape apg apo app c-- caa cac cad cae cag cao cap cca ccc ccd cce ccg cco ccp cda cdc cdd cde cdg cdo cdp ce- cea cec ced cee ceg ceo cep cga cgc cgd cge cgg cgo cgp co- coa coc cod coe cog coo cop cpa cpc cpd cpe cpg cpo cpp daa dac dad dae dag dao dap dca dcc dcd dce dcg dco dcp dda ddc ddd dde ddg ddo ddp de- dea dec ded dee deg deo dep dga dgc dgd dge dgg dgp doa doc dod doe dog doo dop dpa dpc dpd dpe dpg dpo dpp eaa eac ead eae eag eao eap ec- eca ecc ecd ece ecg eco ed- eda edc edd ede edg edo edp eea eec eed eee eeg eeo eep ega egc egd ege egg ego egp eo- eoa eoc eod eoe eog eoo eop ep- epa epc epd epe epg epo epp g-d g-p gaa gac gad gae gag gao gap gca gcc gcd gce gcg gco gcp gda gdc gdd gde gdo gdp ge- gea gec ged gee geg geo gep gga ggc ggd ggg ggo ggp goa goc god goe gog goo gop gpa gpc gpd gpe gpg gpo gpp oaa oac oad oae oag oao oap oc- oca occ ocd ocg oco ocp oda odc odd ode odg odo odp oea oec oed oee oeg oeo oep oga ogc ogd oge ogg ogo ogp oo- ooa ooc ood oog ooo oop op- opa opc opd ope opg opo opp p-p paa pac pad pae pag pao pap pca pcc pcd pce pcg pco pcp pda pdc pdd pde pdg pdo pdp pea pec ped pee peg peo pep pga pgc pgd pge pgg pgo pgp poa poc pod poe pog poo pop ppa ppc ppd ppe ppg ppo ppp