a-a a-c a-t aaa aac aak aao aar aat aav ac- aca acc ack aco acr act acv aka akc akk ako akr akv aoa aoc aok aoo aor aot aov ar- ara arc ark aro arr art arv at- ata atc ato atr att atv av- ava avc avk avo avr avt c-- caa cac cak cao car cat cav cca ccc cck cco ccr cct ccv cka ckc cko ckt co- coa coc cok coo cor cot cov cra crc crk cro crr crt crv cta ctc ctk cto ctr ctt ctv cva cvc cvk cvo cvr cvt cvv k-t ka- kaa kac kak kao kar kat kav kca kcc kck kcr kct kkc kkk kkr kkt kkv koa koc kok koo kor kot kra krc krk kro krr krt krv kta ktc ktk kto ktr ktt ktv kva kvk kvo kvr kvv oaa oac oak oao oar oat oav oc- oca occ ock oco ocr oct ocv oka okc okk oko okr oo- ooa ooc ook ooo oor oot oov or- ora orc ork oro orr ort orv ot- ota otc otk oto otr ott otv ov- ova ovc ovo ovv ra- raa rac rak rao rar rat rav rca rcc rco rcr rct rcv rkc rkk rko rkt rkv roa roc rok roo ror rot rov rra rrc rrk rrr rrt rta rtc rtk rto rtr rtt rtv rva rvc rvo rvr rvt rvv taa tac tak tao tar tat tav tca tcc tck tco tcr tct tcv tka tkc tkk tko tkr tkt to- toa toc tok too tor tot tov tra trc trk tro trr trt trv tta ttc ttk tto ttr ttt ttv tva tvc tvk tvo tvr tvt v-a vaa vac vak vao var vat vav vca vcc vco vcr vct vka vkt voa voc vok voo vor vot vov vra vrc vrk vrr vrt vta vtc vtk vto vtr vtt vtv vva vvc vvo vvr vvt vvv