eee eel eem eep ees eet ele ell elm elp els elt em- eme eml emm emp ems emt ep- epe epl epm epp eps ept es- ese esl esm esp ess est ete etl etm etp ets ett l-p lee lel lem lep les let lle lll llm llp lls llt lme lml lmm lmp lms lmt lpe lpl lpm lpp lps lpt lse lsl lsm lsp lss lst lte ltl ltm ltp lts ltt mee mel mem mep mes met mle mll mlm mlp mls mlt mme mml mmm mmp mms mmt mpe mpl mpm mpp mps mpt mse msl msm msp mss mst mte mtl mtm mtp mts mtt p-p pee pel pem pep pes pet ple pll plm plp pls plt pme pml pmm pmp pms pmt ppe ppl ppm ppp pps ppt ps- pse psl psm psp pss pst pt- pte ptl ptm ptp pts ptt se- see sel sem sep ses set sle sll slm slp sls slt sme sml smm smp sms smt spe spl spm spp sps spt ss- sse ssl ssm ssp sss sst ste stl stm stp sts stt te- tee tel tem tep tes tet tle tll tlm tlp tls tlt tme tml tmm tmp tms tmt tpe tpl tpm tpp tps tpt tse tsl tsm tsp tss tst tte ttl ttm ttp tts ttt