a-a a-b a-z aaa aab aad aag aao aaz ab- aba abb abd abg abo abz ad- ada adb add adg ado adz ag- aga agb agd agg ago agz aoa aob aod aog aoo az- aza azb azd azg azo azz baa bab bad bag bao baz bba bbb bbd bbg bbo bda bdb bdd bdg bdo bdz bga bgb bgd bgg bgo bgz boa bob bod bog boo boz bza bzd bzo bzz daa dab dad dag dao daz dba dbb dbd dbg dbo dbz dda ddb ddd ddg ddo ddz dga dgd dgg dgz doa dob dod dog doo doz dza dzb dzd dzo g-d gaa gab gad gag gao gaz gba gbd gbg gbo gbz gda gdb gdd gdo gga ggb ggd ggg ggo ggz goa gob god gog goo goz gza gzo oaa oab oad oag oao ob- oba obb obd obg obo oda odb odd odg odo oga ogd ogg ogo oo- ooa oob ood oog ooo oza ozo ozz z-g zaa zab zad zag zao zaz zbb zgb zgg zo- zoa zob zod zog zoo zzz