a-a a-c aaa aac aad aae aao aap ac- aca acc acd ace aco acp ad- ada adc add ade ado adp aea aec aed aee aeo aep aoa aoc aod aoe aoo aop ap- apa apc apd ape apo app c-- caa cac cad cae cao cap cca ccc ccd cce cco ccp cda cdc cdd cde cdo cdp ce- cea cec ced cee ceo cep co- coa coc cod coe coo cop cpa cpc cpd cpe cpo cpp daa dac dad dae dao dap dca dcc dcd dce dco dcp dda ddc ddd dde ddo ddp de- dea dec ded dee deo dep doa doc dod doe doo dop dpa dpc dpd dpe dpo dpp eaa eac ead eae eao eap ec- eca ecc ecd ece eco ed- eda edc edd ede edo edp eea eec eed eee eeo eep eo- eoa eoc eod eoe eoo eop ep- epa epc epd epe epo epp oaa oac oad oae oao oap oc- oca occ ocd oco ocp oda odc odd ode odo odp oea oec oed oee oeo oep oo- ooa ooc ood ooo oop op- opa opc opd ope opo opp p-p paa pac pad pae pao pap pca pcc pcd pce pco pcp pda pdc pdd pde pdo pdp pea pec ped pee peo pep poa poc pod poe poo pop ppa ppc ppd ppe ppo ppp