-er eee eek eem eep eer ees eet eke ekp ekr eks ekt em- eme emk emm emp emr ems emt ep- epe epm epp epr eps ept ere erk erm erp err ers ert es- ese esk esm esp esr ess est ete etk etm etp etr ets ett k-t ke- kee kek kem kep ker kes ket kke kkk kkm kkp kkr kks kkt kme kmk kmm kmp kms kmt kpe kpk kpm kpp kpr kps kpt krk krp krr krs krt kse ksk ksm ksp ksr kss kst kte ktk ktm ktp ktr kts ktt m-r mee mek mem mep mer mes met mke mkk mkm mkp mkr mks mkt mme mmk mmm mmp mmr mms mmt mpe mpk mpm mpp mpr mps mpt mre mrk mrm mrp mrr mrs mrt mse msk msm msp msr mss mst mte mtk mtm mtp mtr mts mtt p-p pee pek pem pep per pes pet pke pkm pkp pkr pks pkt pme pmk pmm pmp pmr pms pmt ppe ppk ppm ppp ppr pps ppt pre prk prm prp prr prs prt ps- pse psk psm psp psr pss pst pt- pte ptk ptm ptp ptr pts ptt re- ree rek rem rep rer res ret rke rkk rkm rkp rks rkt rme rmm rmp rmr rms rmt rpe rpk rpm rpp rpr rps rpt rrk rrm rrp rrr rrs rrt rse rsk rsm rsp rsr rss rst rte rtk rtm rtp rtr rts rtt se- see sek sem sep ser ses set sk- ske skk skm skp skr sks skt sme smk smm smp smr sms smt spe spk spm spp spr sps spt sr- sre srk srm srp srr srs srt ss- sse ssk ssm ssp ssr sss sst ste stk stm stp str sts stt te- tee tek tem tep ter tes tet tke tkk tkm tkp tkr tks tkt tme tmk tmm tmp tmr tms tmt tpe tpk tpm tpp tpr tps tpt tre trk trm trp trr trs trt tse tsk tsm tsp tsr tss tst tte ttk ttm ttp ttr tts ttt