-er a-a a-t aaa aae aar aat aau aax aea aee aer aet aeu aex ar- ara are arr art aru arx at- ata ate atr att atu atx au- aua aue aur aut aux ax- axa axe axr axt axx eaa eae ear eat eau eax eea eee eer eet eex era ere err ert eru eta ete etr ett etu etx eu- eua eue eur eut eux ex- exa exe exr ext exu exx ra- raa rae rar rat rau rax re- rea ree rer ret reu rex rra rrr rrt rru rta rte rtr rtt rtu rtx rua rue rur rut ruu rux rxr t-x taa tae tar tat tau tax te- tea tee ter tet teu tex tra tre trr trt tru trx tta tte ttr ttt ttu ttx tua tue tur tut tuu tux txe txt txu ua- uaa uae uar uat uau uea uee uer uet ur- ura ure urr urt uru urx uta ute utr utt utu utx uua uue uur uut uuu uxr uxt uxu xaa xar xat xau xee xer xet xeu xex xrt xrx xtr xtx xue xxx