-er a-a a-i a-t aaa aae aaf aai aap aar aas aat aax aea aee aef aei aep aer aes aet aex af- afa afe aff afi afp afr afs aft afx ai- aia aie aif aii aip air ais ait aix ap- apa ape apf api app apr aps apt apx ar- ara are arf ari arp arr ars art arx as- asa ase asf asi asp asr ass ast asx at- ata ate atf ati atp atr ats att atx ax- axa axe axi axp axr axs axt axx eaa eae eaf eai eap ear eas eat eax eea eee eef eep eer ees eet eex ef- efa efe eff efi efp efr efs eft efx eia eie eif eii eip eir eis eit eix ep- epa epe epf epi epp epr eps ept epx era ere erf eri erp err ers ert es- esa ese esf esi esp esr ess est esx eta ete etf eti etp etr ets ett etx ex- exa exe exi exp exr exs ext exx faa fae faf fai fap far fas fat fax fea fee fef fei fep fer fes fet fex ffa ffe fff ffi ffp ffr ffs fft ffx fia fie fif fii fip fir fis fit fix fpa fpe fpi fpp fpr fps fpt fpx fra fre frf fri frp frr frs frt fsa fse fsf fsi fsp fsr fss fst fsx fta fte ftf fti ftp ftr fts ftt ftx fxe fxi fxp fxr fxs fxt fxx i-f ia- iaa iae iaf iai iap iar ias iat ie- iea iee ief iei iep ier ies iet iex ifa ife iff ifi ifp ifr ifs ift ifx iia iie iif iii iip iir iis iit iix ipa ipe ipf ipi ipp ipr ips ipt ipx ir- ira ire irf iri irp irr irs irt irx is- isa ise isf isi isp isr iss ist ita ite itf iti itp its itt itx ixe ixi p-p paa pae paf pai pap par pas pat pax pea pee pef pei pep per pes pet pex pfa pfe pff pfi pfp pfr pfs pft pfx pia pie pif pii pip pir pis pit pix ppa ppe ppf ppi ppp ppr pps ppt ppx pra pre prf pri prp prr prs prt prx ps- psa pse psf psi psp psr pss pst psx pt- pta pte ptf pti ptp ptr pts ptt ptx pxe pxr pxs pxt ra- raa rae raf rai rap rar ras rat rax re- rea ree ref rei rep rer res ret rex rfa rfe rff rfi rfp rfr rfs rft ria rie rif rii rip rir ris rit rix rpa rpe rpf rpi rpp rpr rps rpt rpx rra rrf rri rrp rrr rrs rrt rsa rse rsf rsi rsp rsr rss rst rsx rta rte rtf rti rtp rtr rts rtt rtx rxp rxr rxs saa sae saf sai sap sar sas sat sax se- sea see sef sei sep ser ses set sex sfa sfe sff sfi sfp sfr sfs sft sfx sia sie sif sii sip sir sis sit six spa spe spf spi spp spr sps spt spx sr- sra sre srf sri srp srr srs srt srx ss- ssa sse ssf ssi ssp ssr sss sst ssx sta ste stf sti stp str sts stt stx sxi sxs sxt t-x taa tae taf tai tap tar tas tat tax te- tea tee tef tei tep ter tes tet tex tfa tfe tff tfi tfp tfr tfs tft tfx tia tie tif tii tip tir tis tit tix tpa tpe tpf tpi tpp tpr tps tpt tpx tra tre trf tri trp trr trs trt trx tsa tse tsf tsi tsp tsr tss tst tsx tta tte ttf tti ttp ttr tts ttt ttx txe txf txi txs txt xaa xaf xap xar xas xat xee xep xer xes xet xex xfa xfe xfs xft xfx xia xie xii xis xit xix xpa xpe xpf xpp xps xpt xrf xrt xrx xsa xsi xsp xss xst xtf xti xtp xtr xts xtx xxi xxp xxx