-er -ey a-a a-b aaa aab aae aag aar aav aay ab- aba abb abe abg abr abv aby aea aeb aee aeg aer aev aey ag- aga agb age agg agr agv agy ar- ara arb are arg arr arv ary av- ava avb ave avg avr avy ay- aya aye ayr baa bab bae bag bar bav bay bba bbb bbe bbg bbr bby be- bea beb bee beg ber bev bey bga bgb bge bgg bgr bgv bra brb bre brg brr brv bry bva bvb bve bvg bvr bvv by- bya bye byg byr eaa eab eae eag ear eav eba ebb ebe ebg ebr ebv eby eea eeb eee eeg eer eev eey ega egb ege egg egr egy era erb ere erg err erv ery eva evb eve evg evr evv evy eya eye eyr gaa gab gae gag gar gav gay gba gbe gbg gbr gbv gby ge- gea geb gee geg ger gev gey gga ggb ggg ggr ggv gra grb gre grg grr grv gry gva gvb gve gvg gvr gy- gya gyb gye gyr ra- raa rab rae rag rar rav ray rba rbb rbe rbg rbr re- rea reb ree reg rer rev rey rga rgb rge rgg rgr rgv rra rrb rrg rrr rva rvb rve rvg rvr rvv rvy ry- rya rye ryg ryr ryy v-a v-e vaa vab vae vag var vav vay vba vbg vbr vbv vea veb vee veg ver vey vga vgg vgr vra vrb vre vrg vrr vry vva vvb vvg vvr vvv vye vyg yaa yab yae yag yar yav yay ybe ybg ybr yby yea yeb yee yeg yer yev yey yga yra yre yrg yva yve yvr yvy yyb yye yyg yyy