a-a a-c aaa aac aah aak aao aar aav ac- aca acc ach ack aco acr acv aha ahc ahh ahk aho ahr ahv aka akc akh akk ako akr akv aoa aoc aoh aok aoo aor aov ar- ara arc arh ark aro arr arv av- ava avc avh avk avo avr c-- caa cac cah cak cao car cav cca ccc cch cck cco ccr ccv ch- cha chc chh chk cho chr chv cka ckc ckh cko co- coa coc coh cok coo cor cov cra crc crh crk cro crr crv cva cvc cvh cvk cvo cvr cvv haa hac hah hak hao har hav hca hcc hch hck hco hcr hcv hha hhc hhh hhk hho hhr hhv hka hkh hkk hko hkr hoa hoc hoh hok hoo hor hov hr- hra hrc hrh hrk hro hrr hrv hv- hva hvc hvk hvo hvr hvv ka- kaa kac kah kak kao kar kav kca kcc kch kck kcr kha khh khk kho khr khv kkc kkh kkk kkr kkv koa koc koh kok koo kor kra krc krk kro krr krv kva kvh kvk kvo kvr kvv oaa oac oah oak oao oar oav oc- oca occ och ock oco ocr ocv oha ohc ohh oho ohr oka okc okk oko okr oo- ooa ooc ooh ook ooo oor oov or- ora orc orh ork oro orr orv ov- ova ovc ovh ovo ovv ra- raa rac rah rak rao rar rav rca rcc rch rco rcr rcv rh- rha rhc rhh rho rhr rhv rkc rkk rko rkv roa roc roh rok roo ror rov rra rrc rrh rrk rrr rva rvc rvh rvo rvr rvv v-a vaa vac vah vak vao var vav vca vcc vch vco vcr vh- vha vhc vho vka voa voc voh vok voo vor vov vra vrc vrh vrk vrr vva vvc vvo vvr vvv