a-a a-c a-z aaa aac aah aao aaz ac- aca acc ach aco acz aha ahc ahh aho ahz aoa aoc aoh aoo az- aza azo azz c-- caa cac cah cao caz cca ccc cch cco ccz ch- cha chc chh cho chz co- coa coc coh coo coz cz- czc czo haa hac hah hao haz hca hcc hch hco hha hhc hhh hho hhz hoa hoc hoh hoo hzo oaa oac oah oao oc- oca occ och oco ocz oha ohc ohh oho oo- ooa ooc ooh ooo oza ozo ozz zaa zac zah zao zaz zco zha zhc zho zo- zoa zoc zoo zzz