a-a a-c a-t aaa aac aar aat aav ac- aca acc acr act acv ar- ara arc arr art arv at- ata atc atr att atv av- ava avc avr avt c-- caa cac car cat cav cca ccc ccr cct ccv cra crc crr crt crv cta ctc ctr ctt ctv cva cvc cvr cvt cvv ra- raa rac rar rat rav rca rcc rcr rct rcv rra rrc rrr rrt rta rtc rtr rtt rtv rva rvc rvr rvt rvv taa tac tar tat tav tca tcc tcr tct tcv tra trc trr trt trv tta ttc ttr ttt ttv tva tvc tvr tvt v-a vaa vac var vat vav vca vcc vcr vct vra vrc vrr vrt vta vtc vtr vtt vtv vva vvc vvr vvt vvv