-er a-a aaa aae aag aao aar aav aea aee aeg aeo aer aev ag- aga age agg ago agr agv aoa aoe aog aoo aor aov ar- ara are arg aro arr arv av- ava ave avg avo avr eaa eae eag eao ear eav eea eee eeg eeo eer eev ega ege egg ego egr eo- eoa eoe eog eoo eor era ere erg ero err erv eva eve evg evo evr evv gaa gae gag gao gar gav ge- gea gee geg geo ger gev gga ggg ggo ggr ggv goa goe gog goo gor gov gra gre grg gro grr grv gva gve gvg gvo gvr oaa oae oag oao oar oav oea oee oeg oeo oer oga oge ogg ogo oo- ooa oog ooo oor oov or- ora ore org oro orr orv ov- ova ove ovo ovv ra- raa rae rag rao rar rav re- rea ree reg reo rer rev rga rge rgg rgo rgr rgv roa roe rog roo ror rov rra rrg rrr rva rve rvg rvo rvr rvv v-a v-e vaa vae vag vao var vav vea vee veg veo ver vga vgg vgo vgr voa voe vog voo vor vov vra vre vrg vrr vva vvg vvo vvr vvv