-er a-a a-t aaa aae aao aar aat aav aax aea aee aeo aer aet aev aex aoa aoe aoo aor aot aov aox ar- ara are aro arr art arv arx at- ata ate ato atr att atv atx av- ava ave avo avr avt avx ax- axa axe axo axr axt axv axx eaa eae eao ear eat eav eax eea eee eeo eer eet eev eex eo- eoa eoe eoo eor eot era ere ero err ert erv eta ete eto etr ett etv etx eva eve evo evr evt evv ex- exa exe exo exr ext exx oaa oae oao oar oat oav oax oea oee oeo oer oet oex oo- ooa ooo oor oot oov oox or- ora ore oro orr ort orv orx ot- ota ote oto otr ott otv ov- ova ove ovo ovv ox- oxa oxo oxt oxx ra- raa rae rao rar rat rav rax re- rea ree reo rer ret rev rex roa roe roo ror rot rov rox rra rrr rrt rta rte rto rtr rtt rtv rtx rva rve rvo rvr rvt rvv rxr t-x taa tae tao tar tat tav tax te- tea tee teo ter tet tev tex to- toa toe too tor tot tov tox tra tre tro trr trt trv trx tta tte tto ttr ttt ttv ttx tva tve tvo tvr tvt tvx txe txt v-a v-e vaa vae vao var vat vav vax vea vee veo ver vet vex voa voe voo vor vot vov vox vra vre vrr vrt vta vte vto vtr vtt vtv vtx vva vvo vvr vvt vvv vxa vxr vxv xaa xar xat xav xee xer xet xev xex xoa xoo xor xot xov xox xrt xrx xtr xtv xtx xvt xxo xxv xxx