a-a a-c aaa aac aad aae aak aav ac- aca acc acd ace ack acv ad- ada adc add ade adk adv aea aec aed aee aek aev aka akc akd ake akk akv av- ava avc avd ave avk c-- caa cac cad cae cak cav cca ccc ccd cce cck ccv cda cdc cdd cde cdk cdv ce- cea cec ced cee cek cev cka ckc ckd cva cvc cvd cve cvk cvv daa dac dad dae dak dav dca dcc dcd dce dck dcv dda ddc ddd dde ddk de- dea dec ded dee dek dev dka dkc dke dkk dva dvc dvd dve dvk eaa eac ead eae eak eav ec- eca ecc ecd ece eck ecv ed- eda edc edd ede edk eea eec eed eee eek eev eka ekc ekd eke ekv eva evc evd eve evv ka- kaa kac kad kae kak kav kca kcc kcd kce kck kda kdc kde kdk ke- kea kec ked kee kek kev kkc kke kkk kkv kva kvk kvv v-a v-e vaa vac vad vae vak vav vca vcc vcd vce vdc vdd vde vdk vdv vea vec ved vee vek vka vva vvc vvv