-er -up eee eek een eep eer ees eke ekp ekr eks eku en- ene enk enn enp enr ens enu ep- epe epn epp epr eps epu ere erk ern erp err ers eru es- ese esk esn esp esr ess esu eu- eue eun eup eur eus ke- kee kek ken kep ker kes kke kkk kkn kkp kkr kks kku kn- kne knk knn knp knr knu kpe kpk kpn kpp kpr kps kpu krk krn krp krr krs kru kse ksk ksn ksp ksr kss ksu kue kuk kun kup kur kus kuu ne- nee nek nen nep ner nes neu nke nkk nkn nkp nkr nks nku nne nnk nnn nnp nns nnu npe npn npp npr nps npu nre nrk nrn nrp nrr nrs nru nse nsk nsn nsp nsr nss nsu nue nuk nun nup nur nus nuu p-p pee pek pen pep per pes peu pke pkn pkp pkr pks pku pn- pne pnk pnn pnp pnr pns pnu ppe ppk ppn ppp ppr pps ppu pre prk prn prp prr prs pru ps- pse psk psn psp psr pss psu pue puk pun pup pur pus puu re- ree rek ren rep rer res reu rke rkk rkp rks rku rnn rnp rnr rns rnu rpe rpk rpn rpp rpr rps rpu rrk rrn rrp rrr rrs rru rse rsk rsn rsp rsr rss rsu rue ruk run rup rur rus ruu se- see sek sen sep ser ses seu sk- ske skk skp skr sks sku sne snk snn snp snr sns snu spe spk spn spp spr sps spu sr- sre srk srn srp srr srs ss- sse ssk ssn ssp ssr sss ssu sue suk sun sup sur sus suu uee uen uep uer ues uke ukk ukn ukp ukr uku un- une unk unn unp unr uns unu up- upe upk upn upp upr ups upu ur- ure urk urn urp urr urs uru use usk usn usp usr uss usu uue uun uur uus uuu