a-a a-c a-z aaa aac aad aag aao aaz ac- aca acc acd acg aco acz ad- ada adc add adg ado adz ag- aga agc agd agg ago agz aoa aoc aod aog aoo az- aza azd azg azo azz c-- caa cac cad cag cao caz cca ccc ccd ccg cco ccz cda cdc cdd cdg cdo cdz cga cgc cgd cgg cgo co- coa coc cod cog coo coz cz- czc czd czo daa dac dad dag dao daz dca dcc dcd dcg dco dda ddc ddd ddg ddo ddz dga dgc dgd dgg dgz doa doc dod dog doo doz dza dzd dzo g-d gaa gac gad gag gao gaz gca gcc gcd gcg gco gda gdc gdd gdo gga ggc ggd ggg ggo ggz goa goc god gog goo goz gza gzo oaa oac oad oag oao oc- oca occ ocd ocg oco ocz oda odc odd odg odo oga ogc ogd ogg ogo oo- ooa ooc ood oog ooo oza ozo ozz z-g zaa zac zad zag zao zaz zco zgg zo- zoa zoc zod zog zoo zzz