-er a-a a-t aaa aae aan aap aar aas aat aax aea aee aen aep aer aes aet aex an- ana ane ann anp anr ans ant anx ap- apa ape apn app apr aps apt apx ar- ara are arn arp arr ars art arx as- asa ase asn asp asr ass ast asx at- ata ate atn atp atr ats att atx ax- axa axe axn axp axr axs axt axx eaa eae ean eap ear eas eat eax eea eee een eep eer ees eet eex en- ena ene enn enp enr ens ent ep- epa epe epn epp epr eps ept epx era ere ern erp err ers ert es- esa ese esn esp esr ess est esx eta ete etn etp etr ets ett etx ex- exa exe exp exr exs ext exx naa nae nan nap nar nas nat nax ne- nea nee nen nep ner nes net nex nna nne nnn nnp nns nnt npa npe npn npp npr nps npt nra nre nrn nrp nrr nrs nrt nrx nsa nse nsn nsp nsr nss nst nsx nta nte ntn ntp ntr nts ntt ntx nxt p-p paa pae pan pap par pas pat pax pea pee pen pep per pes pet pex pn- pna pne pnn pnp pnr pns pnt pnx ppa ppe ppn ppp ppr pps ppt ppx pra pre prn prp prr prs prt prx ps- psa pse psn psp psr pss pst psx pt- pta pte ptn ptp ptr pts ptt ptx pxe pxr pxs pxt ra- raa rae ran rap rar ras rat rax re- rea ree ren rep rer res ret rex rna rnn rnp rnr rns rnt rpa rpe rpn rpp rpr rps rpt rpx rra rrn rrp rrr rrs rrt rsa rse rsn rsp rsr rss rst rsx rta rte rtn rtp rtr rts rtt rtx rxp rxr rxs saa sae san sap sar sas sat sax se- sea see sen sep ser ses set sex sna sne snn snp snr sns snt spa spe spn spp spr sps spt spx sr- sra sre srn srp srr srs srt srx ss- ssa sse ssn ssp ssr sss sst ssx sta ste stn stp str sts stt stx sxn sxs sxt t-x taa tae tan tap tar tas tat tax te- tea tee ten tep ter tes tet tex tna tne tnn tnp tnr tns tnt tnx tpa tpe tpn tpp tpr tps tpt tpx tra tre trn trp trr trs trt trx tsa tse tsn tsp tsr tss tst tsx tta tte ttn ttp ttr tts ttt ttx txe txn txs txt xaa xan xap xar xas xat xee xen xep xer xes xet xex xna xns xpa xpe xpn xpp xps xpt xrt xrx xsa xsp xss xst xtp xtr xts xtx xxp xxx