-er -up eee eef eep eer ees eex ef- efe eff efi efp efr efs efx eie eif eii eip eir eis eiu eix ep- epe epf epi epp epr eps epu epx ere erf eri erp err ers eru es- ese esf esi esp esr ess esu esx eu- eue euf eui eup eur eus eux ex- exe exi exp exr exs exu exx fee fef fei fep fer fes feu fex ffe fff ffi ffp ffr ffs ffu ffx fie fif fii fip fir fis fiu fix fpe fpi fpp fpr fps fpu fpx fre frf fri frp frr frs fru fse fsf fsi fsp fsr fss fsu fsx fue fuf fui fup fur fus fuu fux fxe fxi fxp fxr fxs fxu fxx i-f ie- iee ief iei iep ier ies iex ife iff ifi ifp ifr ifs ifu ifx iie iif iii iip iir iis iiu iix ipe ipf ipi ipp ipr ips ipu ipx ir- ire irf iri irp irr irs iru irx is- ise isf isi isp isr iss isu iu- iue iui iup iur ius ixe ixi p-p pee pef pei pep per pes peu pex pfe pff pfi pfp pfr pfs pfu pfx pie pif pii pip pir pis piu pix ppe ppf ppi ppp ppr pps ppu ppx pre prf pri prp prr prs pru prx ps- pse psf psi psp psr pss psu psx pue puf pui pup pur pus puu pxe pxr pxs re- ree ref rei rep rer res reu rex rfe rff rfi rfp rfr rfs rfu rie rif rii rip rir ris rix rpe rpf rpi rpp rpr rps rpu rpx rrf rri rrp rrr rrs rru rse rsf rsi rsp rsr rss rsu rsx rue ruf rui rup rur rus ruu rux rxp rxr rxs se- see sef sei sep ser ses seu sex sfe sff sfi sfp sfr sfs sfu sfx sie sif sii sip sir sis siu six spe spf spi spp spr sps spu spx sr- sre srf sri srp srr srs srx ss- sse ssf ssi ssp ssr sss ssu ssx sue suf sui sup sur sus suu sux sxi sxs sxu uee uef uei uep uer ues ufe uff ufi ufp ufr ufs ufu ufx uie uif uii uip uir uis uiu up- upe upf upi upp upr ups upu upx ur- ure urf uri urp urr urs uru urx use usf usi usp usr uss usu usx uue uur uus uuu uxf uxr uxu xee xep xer xes xeu xex xfe xfs xfx xie xii xis xiu xix xpe xpf xpp xps xrf xrx xsi xsp xss xue xui xup xus xxi xxp xxx

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