-er -up eee eef eek een eep eer ees ef- efe eff efp efr efs eke ekf ekp ekr eks eku en- ene enf enk enn enp enr ens enu ep- epe epf epn epp epr eps epu ere erf erk ern erp err ers eru es- ese esf esk esn esp esr ess esu eu- eue euf eun eup eur eus fee fef fek fen fep fer fes feu ffe fff ffk ffn ffp ffr ffs ffu fkf fkk fkp fne fnf fnk fnn fnp fnr fns fnu fpe fpk fpn fpp fpr fps fpu fre frf frk frn frp frr frs fru fse fsf fsk fsn fsp fsr fss fsu fue fuf fuk fun fup fur fus fuu ke- kee kef kek ken kep ker kes kff kfs kfu kke kkk kkn kkp kkr kks kku kn- kne knf knk knn knp knr knu kpe kpf kpk kpn kpp kpr kps kpu krf krk krn krp krr krs kru kse ksf ksk ksn ksp ksr kss ksu kue kuk kun kup kur kus kuu ne- nee nef nek nen nep ner nes neu nfe nff nfk nfn nfp nfr nfs nfu nke nkf nkk nkn nkp nkr nks nku nne nnf nnk nnn nnp nns nnu npe npf npn npp npr nps npu nre nrf nrk nrn nrp nrr nrs nru nse nsf nsk nsn nsp nsr nss nsu nue nuk nun nup nur nus nuu p-p pee pef pek pen pep per pes peu pfe pff pfk pfn pfp pfr pfs pfu pke pkf pkn pkp pkr pks pku pn- pne pnf pnk pnn pnp pnr pns pnu ppe ppf ppk ppn ppp ppr pps ppu pre prf prk prn prp prr prs pru ps- pse psf psk psn psp psr pss psu pue puf puk pun pup pur pus puu re- ree ref rek ren rep rer res reu rfe rff rfk rfn rfp rfr rfs rfu rke rkf rkk rkp rks rku rnn rnp rnr rns rnu rpe rpf rpk rpn rpp rpr rps rpu rrf rrk rrn rrp rrr rrs rru rse rsf rsk rsn rsp rsr rss rsu rue ruf ruk run rup rur rus ruu se- see sef sek sen sep ser ses seu sfe sff sfk sfn sfp sfr sfs sfu sk- ske skf skk skp skr sks sku sne snf snk snn snp snr sns snu spe spf spk spn spp spr sps spu sr- sre srf srk srn srp srr srs ss- sse ssf ssk ssn ssp ssr sss ssu sue suf suk sun sup sur sus suu uee uef uen uep uer ues ufe uff ufn ufp ufr ufs ufu uke ukf ukk ukn ukp ukr uku un- une unf unk unn unp unr uns unu up- upe upf upk upn upp upr ups upu ur- ure urf urk urn urp urr urs uru use usf usk usn usp usr uss usu uue uun uur uus uuu