-er a-a a-t aaa aae aag aar aas aat aau aax aea aee aeg aer aes aet aeu aex ag- aga age agg agr ags agt agu agx ar- ara are arg arr ars art aru arx as- asa ase asg asr ass ast asu asx at- ata ate atg atr ats att atu atx au- aua aue aug aur aus aut aux ax- axa axe axr axs axt axx eaa eae eag ear eas eat eau eax eea eee eeg eer ees eet eex ega ege egg egr egs egt egu egx era ere erg err ers ert eru es- esa ese esg esr ess est esu esx eta ete etg etr ets ett etu etx eu- eua eue eug eur eus eut eux ex- exa exe exr exs ext exu exx gaa gae gag gar gas gat gau ge- gea gee geg ger ges get geu gex gga ggg ggr ggs ggt ggu gra gre grg grr grs grt gru grx gsa gse gsg gsr gss gst gsu gsx gta gte gtg gtr gts gtt gtu gtx gu- gua gue gug gur gus gut guu gxa gxs gxt ra- raa rae rag rar ras rat rau rax re- rea ree reg rer res ret reu rex rga rge rgg rgr rgs rgt rgx rra rrg rrr rrs rrt rru rsa rse rsg rsr rss rst rsu rsx rta rte rtg rtr rts rtt rtu rtx rua rue rug rur rus rut ruu rux rxr rxs saa sae sag sar sas sat sau sax se- sea see seg ser ses set seu sex sga sge sgg sgr sgs sgt sgu sgx sr- sra sre srg srr srs srt srx ss- ssa sse ssg ssr sss sst ssu ssx sta ste stg str sts stt stu stx sua sue sug sur sus sut suu sux sxs sxt sxu t-x taa tae tag tar tas tat tau tax te- tea tee teg ter tes tet teu tex tga tge tgg tgr tgs tgt tgu tra tre trg trr trs trt tru trx tsa tse tsg tsr tss tst tsu tsx tta tte ttg ttr tts ttt ttu ttx tua tue tug tur tus tut tuu tux txe txs txt txu ua- uaa uae uag uar uas uat uau uea uee ueg uer ues uet uga uge ugg ugr ugs ugt ugu ugx ur- ura ure urg urr urs urt uru urx usa use usg usr uss ust usu usx uta ute utr uts utt utu utx uua uue uug uur uus uut uuu uxr uxt uxu xaa xag xar xas xat xau xee xeg xer xes xet xeu xex xge xrt xrx xsa xss xst xtr xts xtx xue xus xxx