-er a-a a-i a-t aaa aae aaf aai aan aar aas aat aax aea aee aef aei aen aer aes aet aex af- afa afe aff afi afn afr afs aft afx ai- aia aie aif aii ain air ais ait aix an- ana ane anf ani ann anr ans ant anx ar- ara are arf ari arn arr ars art arx as- asa ase asf asi asn asr ass ast asx at- ata ate atf ati atn atr ats att atx ax- axa axe axi axn axr axs axt axx eaa eae eaf eai ean ear eas eat eax eea eee eef een eer ees eet eex ef- efa efe eff efi efr efs eft efx eia eie eif eii ein eir eis eit eix en- ena ene enf eni enn enr ens ent era ere erf eri ern err ers ert es- esa ese esf esi esn esr ess est esx eta ete etf eti etn etr ets ett etx ex- exa exe exi exr exs ext exx faa fae faf fai fan far fas fat fax fea fee fef fei fen fer fes fet fex ffa ffe fff ffi ffn ffr ffs fft ffx fia fie fif fii fin fir fis fit fix fna fne fnf fni fnn fnr fns fnt fnx fra fre frf fri frn frr frs frt fsa fse fsf fsi fsn fsr fss fst fsx fta fte ftf fti ftn ftr fts ftt ftx fxe fxi fxr fxs fxt fxx i-f ia- iaa iae iaf iai ian iar ias iat ie- iea iee ief iei ien ier ies iet iex ifa ife iff ifi ifn ifr ifs ift ifx iia iie iif iii iin iir iis iit iix in- ina ine inf ini inn inr ins int inx ir- ira ire irf iri irn irr irs irt irx is- isa ise isf isi isn isr iss ist ita ite itf iti itn its itt itx ixe ixi ixn n-i naa nae naf nai nan nar nas nat nax ne- nea nee nef nei nen ner nes net nex nfa nfe nff nfi nfn nfr nfs nft nia nie nif nii nin nir nis nit nix nna nne nnf nni nnn nns nnt nra nre nrf nri nrn nrr nrs nrt nrx nsa nse nsf nsi nsn nsr nss nst nsx nta nte ntf nti ntn ntr nts ntt ntx nxt ra- raa rae raf rai ran rar ras rat rax re- rea ree ref rei ren rer res ret rex rfa rfe rff rfi rfn rfr rfs rft ria rie rif rii rin rir ris rit rix rna rni rnn rnr rns rnt rra rrf rri rrn rrr rrs rrt rsa rse rsf rsi rsn rsr rss rst rsx rta rte rtf rti rtn rtr rts rtt rtx rxr rxs saa sae saf sai san sar sas sat sax se- sea see sef sei sen ser ses set sex sfa sfe sff sfi sfn sfr sfs sft sfx sia sie sif sii sin sir sis sit six sna sne snf sni snn snr sns snt sr- sra sre srf sri srn srr srs srt srx ss- ssa sse ssf ssi ssn ssr sss sst ssx sta ste stf sti stn str sts stt stx sxi sxn sxs sxt t-x taa tae taf tai tan tar tas tat tax te- tea tee tef tei ten ter tes tet tex tfa tfe tff tfi tfn tfr tfs tft tfx tia tie tif tii tin tir tis tit tix tna tne tnf tni tnn tnr tns tnt tnx tra tre trf tri trn trr trs trt trx tsa tse tsf tsi tsn tsr tss tst tsx tta tte ttf tti ttn ttr tts ttt ttx txe txf txi txn txs txt xaa xaf xan xar xas xat xee xen xer xes xet xex xfa xfe xfn xfs xft xfx xia xie xii xin xis xit xix xna xns xrf xrt xrx xsa xsi xss xst xtf xti xtr xts xtx xxi xxx