-er eee eef eek eem eeo eer ees eet ef- efe eff efm efo efr efs eft eke ekf eko ekr eks ekt eku em- eme emf emk emm emo emr ems emt emu eo- eoe eof eok eom eoo eor eos eot eou ere erf erk erm ero err ers ert eru es- ese esf esk esm eso esr ess est esu ete etf etk etm eto etr ets ett etu eu- eue euf eur eus eut fee fef fek fem feo fer fes fet feu ffe fff ffk ffm ffo ffr ffs fft ffu fkf fkk fkm fkt fme fmf fmm fmo fmr fms fmt fmu foe fof fok fom foo for fos fot fou fre frf frk frm fro frr frs frt fru fse fsf fsk fsm fso fsr fss fst fsu fte ftf ftk ftm fto ftr fts ftt ftu fue fuf fuk fum fuo fur fus fut fuu k-t ke- kee kef kek kem keo ker kes ket kff kfm kfo kfs kfu kke kkk kkm kkr kks kkt kku kme kmf kmk kmm kmo kms kmt kmu koe kof kok kom koo kor kos kot kou krf krk kro krr krs krt kru kse ksf ksk ksm kso ksr kss kst ksu kte ktf ktk ktm kto ktr kts ktt ktu kue kuk kum kur kus kut kuu m-f m-o m-r mee mef mek mem meo mer mes met meu mfe mff mfm mfo mfr mfs mft mfu mke mkk mkm mko mkr mks mkt mku mme mmf mmk mmm mmo mmr mms mmt mmu moe mof mok mom moo mor mos mot mou mre mrf mrk mrm mro mrr mrs mrt mru mse msf msk msm mso msr mss mst msu mte mtf mtk mtm mto mtr mts mtt mtu mue muf muk mum mur mus mut muu oee oef oem oeo oer oes oet of- ofe off ofm ofo ofr ofs oft ofu oke okk oko okr oks oku om- ome omf omm omo omr oms omt omu oo- oof ook oom ooo oor oos oot or- ore orf ork orm oro orr ors ort oru os- ose osf osk osm oso osr oss ost osu ot- ote otf otk otm oto otr ots ott otu ou- oue ouf ouk oum ouo our ous out re- ree ref rek rem reo rer res ret reu rfe rff rfk rfm rfo rfr rfs rft rfu rke rkf rkk rkm rko rks rkt rku rme rmf rmm rmo rmr rms rmt roe rof rok rom roo ror ros rot rou rrf rrk rrm rrr rrs rrt rru rse rsf rsk rsm rso rsr rss rst rsu rte rtf rtk rtm rto rtr rts rtt rtu rue ruf ruk rum ruo rur rus rut ruu se- see sef sek sem seo ser ses set seu sfe sff sfk sfm sfo sfr sfs sft sfu sk- ske skf skk skm sko skr sks skt sku sme smf smk smm smo smr sms smt smu soe sof sok som soo sor sos sot sou sr- sre srf srk srm sro srr srs srt ss- sse ssf ssk ssm sso ssr sss sst ssu ste stf stk stm sto str sts stt stu sue suf suk sum suo sur sus sut suu te- tee tef tek tem teo ter tes tet teu tfe tff tfk tfm tfo tfr tfs tft tfu tke tkk tkm tko tkr tks tkt tme tmf tmk tmm tmo tmr tms tmt tmu to- toe tof tok tom too tor tos tot tou tre trf trk trm tro trr trs trt tru tse tsf tsk tsm tso tsr tss tst tsu tte ttf ttk ttm tto ttr tts ttt ttu tue tuf tuk tum tuo tur tus tut tuu uee uef uem uer ues uet ufe uff ufm ufo ufr ufs uft ufu uke ukf ukk ukr uku um- ume umf umm umo umr ums umt umu uoe uok uom uoo uor uos uot ur- ure urf urk urm uro urr urs urt uru use usf usk usm uso usr uss ust usu ute utf utk utm uto utr uts utt utu uue uum uur uus uut uuu