a-a a-c a-t aaa aac aae aak aao aat aav ac- aca acc ace ack aco act acv aea aec aee aek aeo aet aev aka akc ake akk ako akv aoa aoc aoe aok aoo aot aov at- ata atc ate ato att atv av- ava avc ave avk avo avt c-- caa cac cae cak cao cat cav cca ccc cce cck cco cct ccv ce- cea cec cee cek ceo cet cev cka ckc cko ckt co- coa coc coe cok coo cot cov cta ctc cte ctk cto ctt ctv cva cvc cve cvk cvo cvt cvv eaa eac eae eak eao eat eav ec- eca ecc ece eck eco ect ecv eea eec eee eek eeo eet eev eka ekc eke eko ekt ekv eo- eoa eoc eoe eok eoo eot eta etc ete etk eto ett etv eva evc eve evo evt evv k-t ka- kaa kac kae kak kao kat kav kca kcc kce kck kct ke- kea kec kee kek keo ket kev kkc kke kkk kkt kkv koa koc koe kok koo kot kta ktc kte ktk kto ktt ktv kva kvk kvo kvv oaa oac oae oak oao oat oav oc- oca occ ock oco oct ocv oea oec oee oeo oet oka okc oke okk oko oo- ooa ooc ook ooo oot oov ot- ota otc ote otk oto ott otv ov- ova ovc ove ovo ovv taa tac tae tak tao tat tav tca tcc tce tck tco tct tcv te- tea tec tee tek teo tet tev tka tkc tke tkk tko tkt to- toa toc toe tok too tot tov tta ttc tte ttk tto ttt ttv tva tvc tve tvk tvo tvt v-a v-e vaa vac vae vak vao vat vav vca vcc vce vco vct vea vec vee vek veo vet vka vkt voa voc voe vok voo vot vov vta vtc vte vtk vto vtt vtv vva vvc vvo vvt vvv