-er a-a a-t aaa aae aag aar aat aau aax aea aee aeg aer aet aeu aex ag- aga age agg agr agt agu agx ar- ara are arg arr art aru arx at- ata ate atg atr att atu atx au- aua aue aug aur aut aux ax- axa axe axr axt axx eaa eae eag ear eat eau eax eea eee eeg eer eet eex ega ege egg egr egt egu egx era ere erg err ert eru eta ete etg etr ett etu etx eu- eua eue eug eur eut eux ex- exa exe exr ext exu exx gaa gae gag gar gat gau ge- gea gee geg ger get geu gex gga ggg ggr ggt ggu gra gre grg grr grt gru grx gta gte gtg gtr gtt gtu gtx gu- gua gue gug gur gut guu gxa gxt ra- raa rae rag rar rat rau rax re- rea ree reg rer ret reu rex rga rge rgg rgr rgt rgx rra rrg rrr rrt rru rta rte rtg rtr rtt rtu rtx rua rue rug rur rut ruu rux rxr t-x taa tae tag tar tat tau tax te- tea tee teg ter tet teu tex tga tge tgg tgr tgt tgu tra tre trg trr trt tru trx tta tte ttg ttr ttt ttu ttx tua tue tug tur tut tuu tux txe txt txu ua- uaa uae uag uar uat uau uea uee ueg uer uet uga uge ugg ugr ugt ugu ugx ur- ura ure urg urr urt uru urx uta ute utr utt utu utx uua uue uug uur uut uuu uxr uxt uxu xaa xag xar xat xau xee xeg xer xet xeu xex xge xrt xrx xtr xtx xue xxx