a-a a-c aaa aac aar aas aav ac- aca acc acr acs acv ar- ara arc arr ars arv as- asa asc asr ass asv av- ava avc avr avs c-- caa cac car cas cav cca ccc ccr ccs ccv cra crc crr crs crv csa csc csr css csv cva cvc cvr cvs cvv ra- raa rac rar ras rav rca rcc rcr rcs rcv rra rrc rrr rrs rsa rsc rsr rss rsv rva rvc rvr rvs rvv saa sac sar sas sav sca scc scr scs scv sr- sra src srr srs srv ss- ssa ssc ssr sss ssv sva svc svr svs svv v-a vaa vac var vas vav vca vcc vcr vcs vra vrc vrr vrs vsa vsc vsr vss vsv vva vvc vvr vvs vvv