a-a a-c aaa aac aah aao aar aav ac- aca acc ach aco acr acv aha ahc ahh aho ahr ahv aoa aoc aoh aoo aor aov ar- ara arc arh aro arr arv av- ava avc avh avo avr c-- caa cac cah cao car cav cca ccc cch cco ccr ccv ch- cha chc chh cho chr chv co- coa coc coh coo cor cov cra crc crh cro crr crv cva cvc cvh cvo cvr cvv haa hac hah hao har hav hca hcc hch hco hcr hcv hha hhc hhh hho hhr hhv hoa hoc hoh hoo hor hov hr- hra hrc hrh hro hrr hrv hv- hva hvc hvo hvr hvv oaa oac oah oao oar oav oc- oca occ och oco ocr ocv oha ohc ohh oho ohr oo- ooa ooc ooh ooo oor oov or- ora orc orh oro orr orv ov- ova ovc ovh ovo ovv ra- raa rac rah rao rar rav rca rcc rch rco rcr rcv rh- rha rhc rhh rho rhr rhv roa roc roh roo ror rov rra rrc rrh rrr rva rvc rvh rvo rvr rvv v-a vaa vac vah vao var vav vca vcc vch vco vcr vh- vha vhc vho voa voc voh voo vor vov vra vrc vrh vrr vva vvc vvo vvr vvv