-er eee eek eem eeo eep eer ees eet eke eko ekp ekr eks ekt em- eme emk emm emo emp emr ems emt eo- eoe eok eom eoo eop eor eos eot ep- epe epm epo epp epr eps ept ere erk erm ero erp err ers ert es- ese esk esm eso esp esr ess est ete etk etm eto etp etr ets ett k-t ke- kee kek kem keo kep ker kes ket kke kkk kkm kkp kkr kks kkt kme kmk kmm kmo kmp kms kmt koe kok kom koo kop kor kos kot kpe kpk kpm kpo kpp kpr kps kpt krk kro krp krr krs krt kse ksk ksm kso ksp ksr kss kst kte ktk ktm kto ktp ktr kts ktt m-o m-r mee mek mem meo mep mer mes met mke mkk mkm mko mkp mkr mks mkt mme mmk mmm mmo mmp mmr mms mmt moe mok mom moo mop mor mos mot mpe mpk mpm mpo mpp mpr mps mpt mre mrk mrm mro mrp mrr mrs mrt mse msk msm mso msp msr mss mst mte mtk mtm mto mtp mtr mts mtt oee oem oeo oep oer oes oet oke okk oko okp okr oks om- ome omm omo omp omr oms omt oo- ook oom ooo oop oor oos oot op- ope opk opm opo opp opr ops opt or- ore ork orm oro orp orr ors ort os- ose osk osm oso osp osr oss ost ot- ote otk otm oto otp otr ots ott p-p pee pek pem peo pep per pes pet pke pkm pko pkp pkr pks pkt pme pmk pmm pmo pmp pmr pms pmt poe pok pom poo pop por pos pot ppe ppk ppm ppo ppp ppr pps ppt pre prk prm pro prp prr prs prt ps- pse psk psm pso psp psr pss pst pt- pte ptk ptm pto ptp ptr pts ptt re- ree rek rem reo rep rer res ret rke rkk rkm rko rkp rks rkt rme rmm rmo rmp rmr rms rmt roe rok rom roo rop ror ros rot rpe rpk rpm rpo rpp rpr rps rpt rrk rrm rrp rrr rrs rrt rse rsk rsm rso rsp rsr rss rst rte rtk rtm rto rtp rtr rts rtt se- see sek sem seo sep ser ses set sk- ske skk skm sko skp skr sks skt sme smk smm smo smp smr sms smt soe sok som soo sop sor sos sot spe spk spm spo spp spr sps spt sr- sre srk srm sro srp srr srs srt ss- sse ssk ssm sso ssp ssr sss sst ste stk stm sto stp str sts stt te- tee tek tem teo tep ter tes tet tke tkk tkm tko tkp tkr tks tkt tme tmk tmm tmo tmp tmr tms tmt to- toe tok tom too top tor tos tot tpe tpk tpm tpo tpp tpr tps tpt tre trk trm tro trp trr trs trt tse tsk tsm tso tsp tsr tss tst tte ttk ttm tto ttp ttr tts ttt