-er a-a a-t aaa aae aan aar aas aat aax aea aee aen aer aes aet aex an- ana ane ann anr ans ant anx ar- ara are arn arr ars art arx as- asa ase asn asr ass ast asx at- ata ate atn atr ats att atx ax- axa axe axn axr axs axt axx eaa eae ean ear eas eat eax eea eee een eer ees eet eex en- ena ene enn enr ens ent era ere ern err ers ert es- esa ese esn esr ess est esx eta ete etn etr ets ett etx ex- exa exe exr exs ext exx naa nae nan nar nas nat nax ne- nea nee nen ner nes net nex nna nne nnn nns nnt nra nre nrn nrr nrs nrt nrx nsa nse nsn nsr nss nst nsx nta nte ntn ntr nts ntt ntx nxt ra- raa rae ran rar ras rat rax re- rea ree ren rer res ret rex rna rnn rnr rns rnt rra rrn rrr rrs rrt rsa rse rsn rsr rss rst rsx rta rte rtn rtr rts rtt rtx rxr rxs saa sae san sar sas sat sax se- sea see sen ser ses set sex sna sne snn snr sns snt sr- sra sre srn srr srs srt srx ss- ssa sse ssn ssr sss sst ssx sta ste stn str sts stt stx sxn sxs sxt t-x taa tae tan tar tas tat tax te- tea tee ten ter tes tet tex tna tne tnn tnr tns tnt tnx tra tre trn trr trs trt trx tsa tse tsn tsr tss tst tsx tta tte ttn ttr tts ttt ttx txe txn txs txt xaa xan xar xas xat xee xen xer xes xet xex xna xns xrt xrx xsa xss xst xtr xts xtx xxx