a-a a-c aaa aac aad aao aar aav ac- aca acc acd aco acr acv ad- ada adc add ado adr adv aoa aoc aod aoo aor aov ar- ara arc ard aro arr arv av- ava avc avd avo avr c-- caa cac cad cao car cav cca ccc ccd cco ccr ccv cda cdc cdd cdo cdr cdv co- coa coc cod coo cor cov cra crc crd cro crr crv cva cvc cvd cvo cvr cvv daa dac dad dao dar dav dca dcc dcd dco dcr dcv dda ddc ddd ddo ddr doa doc dod doo dor dov dra drc drd dro drr drv dva dvc dvd dvr oaa oac oad oao oar oav oc- oca occ ocd oco ocr ocv oda odc odd odo odr odv oo- ooa ooc ood ooo oor oov or- ora orc ord oro orr orv ov- ova ovc ovd ovo ovv ra- raa rac rad rao rar rav rca rcc rcd rco rcr rcv rda rdc rdd rdo rdr rdv roa roc rod roo ror rov rra rrc rrd rrr rva rvc rvd rvo rvr rvv v-a vaa vac vad vao var vav vca vcc vcd vco vcr vdc vdd vdo vdr vdv voa voc vod voo vor vov vra vrc vrd vrr vva vvc vvo vvr vvv