a-a a-c aaa aac aad aar aav ac- aca acc acd acr acv ad- ada adc add adr adv ar- ara arc ard arr arv av- ava avc avd avr c-- caa cac cad car cav cca ccc ccd ccr ccv cda cdc cdd cdr cdv cra crc crd crr crv cva cvc cvd cvr cvv daa dac dad dar dav dca dcc dcd dcr dcv dda ddc ddd ddr dra drc drd drr drv dva dvc dvd dvr ra- raa rac rad rar rav rca rcc rcd rcr rcv rda rdc rdd rdr rdv rra rrc rrd rrr rva rvc rvd rvr rvv v-a vaa vac vad var vav vca vcc vcd vcr vdc vdd vdr vdv vra vrc vrd vrr vva vvc vvr vvv