a-a a-c a-t aaa aac aao aas aat aav ac- aca acc aco acs act acv aoa aoc aoo aos aot aov as- asa asc aso ass ast asv at- ata atc ato ats att atv av- ava avc avo avs avt c-- caa cac cao cas cat cav cca ccc cco ccs cct ccv co- coa coc coo cos cot cov csa csc cso css cst csv cta ctc cto cts ctt ctv cva cvc cvo cvs cvt cvv oaa oac oao oas oat oav oc- oca occ oco ocs oct ocv oo- ooa ooc ooo oos oot oov os- osa osc oso oss ost osv ot- ota otc oto ots ott otv ov- ova ovc ovo ovs ovv saa sac sao sas sat sav sca scc sco scs sct scv soa soc soo sos sot sov ss- ssa ssc sso sss sst ssv sta stc sto sts stt stv sva svc svo svs svt svv taa tac tao tas tat tav tca tcc tco tcs tct tcv to- toa toc too tos tot tov tsa tsc tso tss tst tsv tta ttc tto tts ttt ttv tva tvc tvo tvs tvt v-a vaa vac vao vas vat vav vca vcc vco vcs vct voa voc voo vos vot vov vsa vsc vso vss vst vsv vta vtc vto vts vtt vtv vva vvc vvo vvs vvt vvv