-er a-a a-i aaa aae aai aar aav aax aea aee aei aer aev aex ai- aia aie aii air aiv aix ar- ara are ari arr arv arx av- ava ave avi avr avx ax- axa axe axi axr axv axx eaa eae eai ear eav eax eea eee eer eev eex eia eie eii eir eiv eix era ere eri err erv eva eve evi evr evv ex- exa exe exi exr exx i-v ia- iaa iae iai iar iav ie- iea iee iei ier iev iex iia iie iii iir iix ir- ira ire iri irr irv irx iva ive ivi ivr ivv ivx ixe ixi ra- raa rae rai rar rav rax re- rea ree rei rer rev rex ria rie rii rir riv rix rra rri rrr rva rve rvi rvr rvv rxr v-a v-e vaa vae vai var vav vax vea vee vei ver vex vi- via vie vii vir viv vix vra vre vri vrr vva vvi vvr vvv vxa vxr vxv xaa xar xav xee xer xev xex xia xie xii xiv xix xrx xvi xxi xxv xxx