-er eee eel eem eep eer ees eet ele ell elm elp elr els elt em- eme eml emm emp emr ems emt ep- epe epl epm epp epr eps ept ere erl erm erp err ers ert es- ese esl esm esp esr ess est ete etl etm etp etr ets ett l-p lee lel lem lep ler les let lle lll llm llp llr lls llt lme lml lmm lmp lmr lms lmt lpe lpl lpm lpp lpr lps lpt lrm lrp lrr lrs lrt lse lsl lsm lsp lsr lss lst lte ltl ltm ltp ltr lts ltt m-r mee mel mem mep mer mes met mle mll mlm mlp mlr mls mlt mme mml mmm mmp mmr mms mmt mpe mpl mpm mpp mpr mps mpt mre mrl mrm mrp mrr mrs mrt mse msl msm msp msr mss mst mte mtl mtm mtp mtr mts mtt p-p pee pel pem pep per pes pet ple pll plm plp plr pls plt pme pml pmm pmp pmr pms pmt ppe ppl ppm ppp ppr pps ppt pre prl prm prp prr prs prt ps- pse psl psm psp psr pss pst pt- pte ptl ptm ptp ptr pts ptt re- ree rel rem rep rer res ret rle rll rlm rlp rlr rls rlt rme rml rmm rmp rmr rms rmt rpe rpl rpm rpp rpr rps rpt rrl rrm rrp rrr rrs rrt rse rsl rsm rsp rsr rss rst rte rtl rtm rtp rtr rts rtt se- see sel sem sep ser ses set sle sll slm slp slr sls slt sme sml smm smp smr sms smt spe spl spm spp spr sps spt sr- sre srl srm srp srr srs srt ss- sse ssl ssm ssp ssr sss sst ste stl stm stp str sts stt te- tee tel tem tep ter tes tet tle tll tlm tlp tlr tls tlt tme tml tmm tmp tmr tms tmt tpe tpl tpm tpp tpr tps tpt tre trl trm trp trr trs trt tse tsl tsm tsp tsr tss tst tte ttl ttm ttp ttr tts ttt