-er -ey a-a aaa aae aar aax aay aea aee aer aex aey ar- ara are arr arx ary ax- axa axe axr axx ay- aya aye ayr ayx eaa eae ear eax eea eee eer eex eey era ere err ery ex- exa exe exr exx exy eya eye eyr ra- raa rae rar rax ray re- rea ree rer rex rey rra rrr rxr ry- rya rye ryr ryy xaa xar xee xer xex xrx xry xxx xxy xyr xyy yaa yae yar yax yay yea yee yer yex yey yra yre yxa yxe yxy yye yyy