-er eee eel eep eer ees eet eie eii eil eip eir eis eit ele eli ell elp elr els elt ep- epe epi epl epp epr eps ept ere eri erl erp err ers ert es- ese esi esl esp esr ess est ete eti etl etp etr ets ett ie- iee iei iel iep ier ies iet iie iii iil iip iir iis iit il- ile ili ill ilp ilr ils ilt ipe ipi ipl ipp ipr ips ipt ir- ire iri irl irp irr irs irt is- ise isi isl isp isr iss ist ite iti itl itp its itt l-p lee lei lel lep ler les let lie lii lil lip lir lis lit lle lli lll llp llr lls llt lpe lpi lpl lpp lpr lps lpt lri lrp lrr lrs lrt lse lsi lsl lsp lsr lss lst lte lti ltl ltp ltr lts ltt p-p pee pei pel pep per pes pet pie pii pil pip pir pis pit ple pli pll plp plr pls plt ppe ppi ppl ppp ppr pps ppt pre pri prl prp prr prs prt ps- pse psi psl psp psr pss pst pt- pte pti ptl ptp ptr pts ptt re- ree rei rel rep rer res ret rie rii ril rip rir ris rit rle rli rll rlp rlr rls rlt rpe rpi rpl rpp rpr rps rpt rri rrl rrp rrr rrs rrt rse rsi rsl rsp rsr rss rst rte rti rtl rtp rtr rts rtt se- see sei sel sep ser ses set sie sii sil sip sir sis sit sle sli sll slp slr sls slt spe spi spl spp spr sps spt sr- sre sri srl srp srr srs srt ss- sse ssi ssl ssp ssr sss sst ste sti stl stp str sts stt te- tee tei tel tep ter tes tet tie tii til tip tir tis tit tle tli tll tlp tlr tls tlt tpe tpi tpl tpp tpr tps tpt tre tri trl trp trr trs trt tse tsi tsl tsp tsr tss tst tte tti ttl ttp ttr tts ttt