-er -ey eee eer eet eex eey ere err ert eru ery ete etr ett etu etx ety eu- eue eur eut eux ex- exe exr ext exu exx exy eye eyr eyt re- ree rer ret reu rex rey rrr rrt rru rte rtr rtt rtu rtx rty rue rur rut ruu rux ruy rxr ry- rye ryr ryu ryy t-x te- tee ter tet teu tex tey tre trr trt tru trx try tte ttr ttt ttu ttx tty tue tur tut tuu tux tuy txe txt txu tye tyr tyt uee uer uet uey ur- ure urr urt uru urx ury ute utr utt utu utx uty uue uur uut uuu uxr uxt uxu uyu xee xer xet xeu xex xrt xrx xry xtr xtx xty xue xxx xxy xyr xyy yee yer yet yex yey yre yrt yru yte ytr ytt ytu yue yur yut yuu yux yuy yxe yxy yye yyt yyu yyy