-er eee eef eeo eep eer ees eet ef- efe eff efi efo efp efr efs eft eie eif eii eio eip eir eis eit eo- eoe eof eoi eoo eop eor eos eot ep- epe epf epi epo epp epr eps ept ere erf eri ero erp err ers ert es- ese esf esi eso esp esr ess est ete etf eti eto etp etr ets ett fee fef fei feo fep fer fes fet ffe fff ffi ffo ffp ffr ffs fft fie fif fii fip fir fis fit foe fof foi foo fop for fos fot fpe fpi fpo fpp fpr fps fpt fre frf fri fro frp frr frs frt fse fsf fsi fso fsp fsr fss fst fte ftf fti fto ftp ftr fts ftt i-f ie- iee ief iei iep ier ies iet ife iff ifi ifo ifp ifr ifs ift iie iif iii iio iip iir iis iit io- ioe iof ioi ioo iop ior ios iot ipe ipf ipi ipo ipp ipr ips ipt ir- ire irf iri iro irp irr irs irt is- ise isf isi iso isp isr iss ist ite itf iti ito itp its itt o-i oee oef oei oeo oep oer oes oet of- ofe off ofi ofo ofp ofr ofs oft oie oif oii oio oip oir ois oit oo- oof ooi ooo oop oor oos oot op- ope opf opi opo opp opr ops opt or- ore orf ori oro orp orr ors ort os- ose osf osi oso osp osr oss ost ot- ote otf oti oto otp otr ots ott p-p pee pef pei peo pep per pes pet pfe pff pfi pfo pfp pfr pfs pft pie pif pii pio pip pir pis pit poe pof poi poo pop por pos pot ppe ppf ppi ppo ppp ppr pps ppt pre prf pri pro prp prr prs prt ps- pse psf psi pso psp psr pss pst pt- pte ptf pti pto ptp ptr pts ptt re- ree ref rei reo rep rer res ret rfe rff rfi rfo rfp rfr rfs rft rie rif rii rio rip rir ris rit roe rof roi roo rop ror ros rot rpe rpf rpi rpo rpp rpr rps rpt rrf rri rrp rrr rrs rrt rse rsf rsi rso rsp rsr rss rst rte rtf rti rto rtp rtr rts rtt se- see sef sei seo sep ser ses set sfe sff sfi sfo sfp sfr sfs sft sie sif sii sio sip sir sis sit soe sof soi soo sop sor sos sot spe spf spi spo spp spr sps spt sr- sre srf sri sro srp srr srs srt ss- sse ssf ssi sso ssp ssr sss sst ste stf sti sto stp str sts stt te- tee tef tei teo tep ter tes tet tfe tff tfi tfo tfp tfr tfs tft tie tif tii tio tip tir tis tit to- toe tof toi too top tor tos tot tpe tpf tpi tpo tpp tpr tps tpt tre trf tri tro trp trr trs trt tse tsf tsi tso tsp tsr tss tst tte ttf tti tto ttp ttr tts ttt