a-a a-c aaa aac aao aar aau aav ac- aca acc aco acr acu acv aoa aoc aoo aor aou aov ar- ara arc aro arr aru arv au- aua auc auo aur auv av- ava avc avo avr avu c-- caa cac cao car cau cav cca ccc cco ccr ccu ccv co- coa coc coo cor cou cov cra crc cro crr cru crv cua cuc cuo cur cuu cuv cva cvc cvo cvr cvu cvv oaa oac oao oar oau oav oc- oca occ oco ocr ocu ocv oo- ooa ooc ooo oor oov or- ora orc oro orr oru orv ou- oua ouc ouo our ov- ova ovc ovo ovv ra- raa rac rao rar rau rav rca rcc rco rcr rcu rcv roa roc roo ror rou rov rra rrc rrr rru rua ruc ruo rur ruu ruv rva rvc rvo rvr rvu rvv ua- uaa uac uao uar uau uav uca ucc uco ucr ucu ucv uoa uoc uoo uor ur- ura urc uro urr uru uua uuc uur uuu uva uvc uvo uvu uvv v-a vaa vac vao var vau vav vca vcc vco vcr vcu voa voc voo vor vou vov vra vrc vrr vru vur vuv vva vvc vvo vvr vvv