-er -ey a-a a-t aaa aae aar aat aax aay aea aee aer aet aex aey ar- ara are arr art arx ary at- ata ate atr att atx ax- axa axe axr axt axx ay- aya aye ayr ayt ayx eaa eae ear eat eax eea eee eer eet eex eey era ere err ert ery eta ete etr ett etx ety ex- exa exe exr ext exx exy eya eye eyr eyt ra- raa rae rar rat rax ray re- rea ree rer ret rex rey rra rrr rrt rta rte rtr rtt rtx rty rxr ry- rya rye ryr ryy t-x taa tae tar tat tax tay te- tea tee ter tet tex tey tra tre trr trt trx try tta tte ttr ttt ttx tty txe txt tya tye tyr tyt xaa xar xat xee xer xet xex xrt xrx xry xtr xtx xty xxx xxy xyr xyy yaa yae yar yat yax yay yea yee yer yet yex yey yra yre yrt yta yte ytr ytt yxa yxe yxy yye yyt yyy