a-a a-c a-t aaa aac aao aar aat aav aax ac- aca acc aco acr act acv acx aoa aoc aoo aor aot aov aox ar- ara arc aro arr art arv arx at- ata atc ato atr att atv atx av- ava avc avo avr avt avx ax- axa axo axr axt axv axx c-- caa cac cao car cat cav cax cca ccc cco ccr cct ccv ccx co- coa coc coo cor cot cov cox cra crc cro crr crt crv crx cta ctc cto ctr ctt ctv ctx cva cvc cvo cvr cvt cvv cvx cxc cxo cxr cxt cxv cxx oaa oac oao oar oat oav oax oc- oca occ oco ocr oct ocv ocx oo- ooa ooc ooo oor oot oov oox or- ora orc oro orr ort orv orx ot- ota otc oto otr ott otv ov- ova ovc ovo ovv ox- oxa oxc oxo oxt oxx ra- raa rac rao rar rat rav rax rca rcc rco rcr rct rcv rcx roa roc roo ror rot rov rox rra rrc rrr rrt rta rtc rto rtr rtt rtv rtx rva rvc rvo rvr rvt rvv rxr t-x taa tac tao tar tat tav tax tca tcc tco tcr tct tcv tcx to- toa toc too tor tot tov tox tra trc tro trr trt trv trx tta ttc tto ttr ttt ttv ttx tva tvc tvo tvr tvt tvx txt v-a vaa vac vao var vat vav vax vca vcc vco vcr vct vcx voa voc voo vor vot vov vox vra vrc vrr vrt vta vtc vto vtr vtt vtv vtx vva vvc vvo vvr vvt vvv vxa vxr vxv xaa xac xar xat xav xcr xcv xcx xoa xoc xoo xor xot xov xox xrc xrt xrx xtc xtr xtv xtx xvt xxo xxv xxx