a-a a-c aaa aac aad aae aao ac- aca acc acd ace aco ad- ada adc add ade ado aea aec aed aee aeo aoa aoc aod aoe aoo c-- caa cac cad cae cao cca ccc ccd cce cco cda cdc cdd cde cdo ce- cea cec ced cee ceo co- coa coc cod coe coo daa dac dad dae dao dca dcc dcd dce dco dda ddc ddd dde ddo de- dea dec ded dee deo doa doc dod doe doo eaa eac ead eae eao ec- eca ecc ecd ece eco ed- eda edc edd ede edo eea eec eed eee eeo eo- eoa eoc eod eoe eoo oaa oac oad oae oao oc- oca occ ocd oco oda odc odd ode odo oea oec oed oee oeo oo- ooa ooc ood ooo