a-a a-c aaa aac aah aak aao aav ac- aca acc ach ack aco acv aha ahc ahh ahk aho ahv aka akc akh akk ako akv aoa aoc aoh aok aoo aov av- ava avc avh avk avo c-- caa cac cah cak cao cav cca ccc cch cck cco ccv ch- cha chc chh chk cho chv cka ckc ckh cko co- coa coc coh cok coo cov cva cvc cvh cvk cvo cvv haa hac hah hak hao hav hca hcc hch hck hco hcv hha hhc hhh hhk hho hhv hka hkh hkk hko hoa hoc hoh hok hoo hov hv- hva hvc hvk hvo hvv ka- kaa kac kah kak kao kav kca kcc kch kck kha khh khk kho khv kkc kkh kkk kkv koa koc koh kok koo kva kvh kvk kvo kvv oaa oac oah oak oao oav oc- oca occ och ock oco ocv oha ohc ohh oho oka okc okk oko oo- ooa ooc ooh ook ooo oov ov- ova ovc ovh ovo ovv v-a vaa vac vah vak vao vav vca vcc vch vco vh- vha vhc vho vka voa voc voh vok voo vov vva vvc vvo vvv