a-a a-c a-t aaa aac aan aar aat aav ac- aca acc acn acr act acv an- ana anc ann anr ant anv ar- ara arc arn arr art arv at- ata atc atn atr att atv av- ava avc avn avr avt c-- caa cac can car cat cav cca ccc ccn ccr cct ccv cn- cna cnc cnn cnr cnt cnv cra crc crn crr crt crv cta ctc ctn ctr ctt ctv cva cvc cvn cvr cvt cvv naa nac nan nar nat nav nca ncc ncn ncr nct ncv nna nnc nnn nnt nnv nra nrc nrn nrr nrt nrv nta ntc ntn ntr ntt ntv nva nvc nvn nvt nvv ra- raa rac ran rar rat rav rca rcc rcn rcr rct rcv rna rnc rnn rnr rnt rnv rra rrc rrn rrr rrt rta rtc rtn rtr rtt rtv rva rvc rvn rvr rvt rvv taa tac tan tar tat tav tca tcc tcn tcr tct tcv tna tnc tnn tnr tnt tra trc trn trr trt trv tta ttc ttn ttr ttt ttv tva tvc tvn tvr tvt v-a vaa vac van var vat vav vca vcc vcn vcr vct vn- vna vnr vnv vra vrc vrn vrr vrt vta vtc vtr vtt vtv vva vvc vvr vvt vvv