a-a a-c aaa aac aan aao aar aav ac- aca acc acn aco acr acv an- ana anc ann ano anr anv aoa aoc aon aoo aor aov ar- ara arc arn aro arr arv av- ava avc avn avo avr c-- caa cac can cao car cav cca ccc ccn cco ccr ccv cn- cna cnc cnn cno cnr cnv co- coa coc con coo cor cov cra crc crn cro crr crv cva cvc cvn cvo cvr cvv naa nac nan nao nar nav nca ncc ncn nco ncr ncv nna nnc nnn nno nnv no- noa noc non noo nor nov nra nrc nrn nro nrr nrv nva nvc nvn nvv oaa oac oan oao oar oav oc- oca occ ocn oco ocr ocv on- ona onc onn ono onr oo- ooa ooc oon ooo oor oov or- ora orc orn oro orr orv ov- ova ovc ovo ovv ra- raa rac ran rao rar rav rca rcc rcn rco rcr rcv rna rnc rnn rno rnr rnv roa roc ron roo ror rov rra rrc rrn rrr rva rvc rvn rvo rvr rvv v-a vaa vac van vao var vav vca vcc vcn vco vcr vn- vna vno vnr vnv voa voc von voo vor vov vra vrc vrn vrr vva vvc vvo vvr vvv