-er eee eel eep eer ees eet ele ell elp elr els elt ep- epe epl epp epr eps ept ere erl erp err ers ert es- ese esl esp esr ess est ete etl etp etr ets ett l-p lee lel lep ler les let lle lll llp llr lls llt lpe lpl lpp lpr lps lpt lrp lrr lrs lrt lse lsl lsp lsr lss lst lte ltl ltp ltr lts ltt p-p pee pel pep per pes pet ple pll plp plr pls plt ppe ppl ppp ppr pps ppt pre prl prp prr prs prt ps- pse psl psp psr pss pst pt- pte ptl ptp ptr pts ptt re- ree rel rep rer res ret rle rll rlp rlr rls rlt rpe rpl rpp rpr rps rpt rrl rrp rrr rrs rrt rse rsl rsp rsr rss rst rte rtl rtp rtr rts rtt se- see sel sep ser ses set sle sll slp slr sls slt spe spl spp spr sps spt sr- sre srl srp srr srs srt ss- sse ssl ssp ssr sss sst ste stl stp str sts stt te- tee tel tep ter tes tet tle tll tlp tlr tls tlt tpe tpl tpp tpr tps tpt tre trl trp trr trs trt tse tsl tsp tsr tss tst tte ttl ttp ttr tts ttt