a-a a-c a-t aaa aac aad aao aat aav ac- aca acc acd aco act acv ad- ada adc add ado adt adv aoa aoc aod aoo aot aov at- ata atc atd ato att atv av- ava avc avd avo avt c-- caa cac cad cao cat cav cca ccc ccd cco cct ccv cda cdc cdd cdo cdt cdv co- coa coc cod coo cot cov cta ctc ctd cto ctt ctv cva cvc cvd cvo cvt cvv daa dac dad dao dat dav dca dcc dcd dco dct dcv dda ddc ddd ddo ddt doa doc dod doo dot dov dta dtc dtd dto dtt dtv dva dvc dvd dvt oaa oac oad oao oat oav oc- oca occ ocd oco oct ocv oda odc odd odo odt odv oo- ooa ooc ood ooo oot oov ot- ota otc otd oto ott otv ov- ova ovc ovd ovo ovv taa tac tad tao tat tav tca tcc tcd tco tct tcv tda tdc tdd tdo tdt tdv to- toa toc tod too tot tov tta ttc ttd tto ttt ttv tva tvc tvd tvo tvt v-a vaa vac vad vao vat vav vca vcc vcd vco vct vdc vdd vdo vdt vdv voa voc vod voo vot vov vta vtc vto vtt vtv vva vvc vvo vvt vvv