-er eee eef eek eem eeo eep eer eet ef- efe eff efm efo efp efr eft eke ekf eko ekp ekr ekt em- eme emf emk emm emo emp emr emt eo- eoe eof eok eom eoo eop eor eot ep- epe epf epm epo epp epr ept ere erf erk erm ero erp err ert ete etf etk etm eto etp etr ett fee fef fek fem feo fep fer fet ffe fff ffk ffm ffo ffp ffr fft fkf fkk fkm fkp fkt fme fmf fmm fmo fmp fmr fmt foe fof fok fom foo fop for fot fpe fpk fpm fpo fpp fpr fpt fre frf frk frm fro frp frr frt fte ftf ftk ftm fto ftp ftr ftt k-t ke- kee kef kek kem keo kep ker ket kff kfm kfo kke kkk kkm kkp kkr kkt kme kmf kmk kmm kmo kmp kmt koe kof kok kom koo kop kor kot kpe kpf kpk kpm kpo kpp kpr kpt krf krk kro krp krr krt kte ktf ktk ktm kto ktp ktr ktt m-f m-o m-r mee mef mek mem meo mep mer met mfe mff mfm mfo mfp mfr mft mke mkk mkm mko mkp mkr mkt mme mmf mmk mmm mmo mmp mmr mmt moe mof mok mom moo mop mor mot mpe mpf mpk mpm mpo mpp mpr mpt mre mrf mrk mrm mro mrp mrr mrt mte mtf mtk mtm mto mtp mtr mtt oee oef oem oeo oep oer oet of- ofe off ofm ofo ofp ofr oft oke okk oko okp okr om- ome omf omm omo omp omr omt oo- oof ook oom ooo oop oor oot op- ope opf opk opm opo opp opr opt or- ore orf ork orm oro orp orr ort ot- ote otf otk otm oto otp otr ott p-p pee pef pek pem peo pep per pet pfe pff pfk pfm pfo pfp pfr pft pke pkf pkm pko pkp pkr pkt pme pmf pmk pmm pmo pmp pmr pmt poe pof pok pom poo pop por pot ppe ppf ppk ppm ppo ppp ppr ppt pre prf prk prm pro prp prr prt pt- pte ptf ptk ptm pto ptp ptr ptt re- ree ref rek rem reo rep rer ret rfe rff rfk rfm rfo rfp rfr rft rke rkf rkk rkm rko rkp rkt rme rmf rmm rmo rmp rmr rmt roe rof rok rom roo rop ror rot rpe rpf rpk rpm rpo rpp rpr rpt rrf rrk rrm rrp rrr rrt rte rtf rtk rtm rto rtp rtr rtt te- tee tef tek tem teo tep ter tet tfe tff tfk tfm tfo tfp tfr tft tke tkk tkm tko tkp tkr tkt tme tmf tmk tmm tmo tmp tmr tmt to- toe tof tok tom too top tor tot tpe tpf tpk tpm tpo tpp tpr tpt tre trf trk trm tro trp trr trt tte ttf ttk ttm tto ttp ttr ttt