-er a-a aaa aae aaf aag aar aav aea aee aef aeg aer aev af- afa afe aff afg afr afv ag- aga age agf agg agr agv ar- ara are arf arg arr arv av- ava ave avf avg avr eaa eae eaf eag ear eav eea eee eef eeg eer eev ef- efa efe eff efg efr ega ege egf egg egr era ere erf erg err erv eva eve evf evg evr evv faa fae faf fag far fav fea fee fef feg fer fev ffa ffe fff ffg ffr ffv fga fge fgf fgg fgr fgv fra fre frf frg frr fva fvg gaa gae gaf gag gar gav ge- gea gee gef geg ger gev gfa gfe gff gfr gga ggg ggr ggv gra gre grf grg grr grv gva gve gvf gvg gvr ra- raa rae raf rag rar rav re- rea ree ref reg rer rev rfa rfe rff rfg rfr rfv rga rge rgf rgg rgr rgv rra rrf rrg rrr rva rve rvf rvg rvr rvv v-a v-e vaa vae vag var vav vea vee vef veg ver vfa vff vfg vfr vfv vga vgf vgg vgr vra vre vrf vrg vrr vva vvg vvr vvv