a-a a-c a-z aaa aac aah aao aav aaz ac- aca acc ach aco acv acz aha ahc ahh aho ahv ahz aoa aoc aoh aoo aov av- ava avc avh avo avz az- aza azo azz c-- caa cac cah cao cav caz cca ccc cch cco ccv ccz ch- cha chc chh cho chv chz co- coa coc coh coo cov coz cva cvc cvh cvo cvv cvz cz- czc czo haa hac hah hao hav haz hca hcc hch hco hcv hha hhc hhh hho hhv hhz hoa hoc hoh hoo hov hv- hva hvc hvo hvv hzo oaa oac oah oao oav oc- oca occ och oco ocv ocz oha ohc ohh oho oo- ooa ooc ooh ooo oov ov- ova ovc ovh ovo ovv oza ozo ozz v-a vaa vac vah vao vav vaz vca vcc vch vco vh- vha vhc vho voa voc voh voo vov voz vva vvc vvo vvv vvz zaa zac zah zao zav zaz zco zha zhc zho zo- zoa zoc zoo zzz