-er -up eee eek een eep eer ees eet eke ekp ekr eks ekt eku en- ene enk enn enp enr ens ent enu ep- epe epn epp epr eps ept epu ere erk ern erp err ers ert eru es- ese esk esn esp esr ess est esu ete etk etn etp etr ets ett etu eu- eue eun eup eur eus eut k-t ke- kee kek ken kep ker kes ket kke kkk kkn kkp kkr kks kkt kku kn- kne knk knn knp knr knt knu kpe kpk kpn kpp kpr kps kpt kpu krk krn krp krr krs krt kru kse ksk ksn ksp ksr kss kst ksu kte ktk ktn ktp ktr kts ktt ktu kue kuk kun kup kur kus kut kuu ne- nee nek nen nep ner nes net neu nke nkk nkn nkp nkr nks nkt nku nne nnk nnn nnp nns nnt nnu npe npn npp npr nps npt npu nre nrk nrn nrp nrr nrs nrt nru nse nsk nsn nsp nsr nss nst nsu nte ntk ntn ntp ntr nts ntt ntu nue nuk nun nup nur nus nut nuu p-p pee pek pen pep per pes pet peu pke pkn pkp pkr pks pkt pku pn- pne pnk pnn pnp pnr pns pnt pnu ppe ppk ppn ppp ppr pps ppt ppu pre prk prn prp prr prs prt pru ps- pse psk psn psp psr pss pst psu pt- pte ptk ptn ptp ptr pts ptt ptu pue puk pun pup pur pus put puu re- ree rek ren rep rer res ret reu rke rkk rkp rks rkt rku rnn rnp rnr rns rnt rnu rpe rpk rpn rpp rpr rps rpt rpu rrk rrn rrp rrr rrs rrt rru rse rsk rsn rsp rsr rss rst rsu rte rtk rtn rtp rtr rts rtt rtu rue ruk run rup rur rus rut ruu se- see sek sen sep ser ses set seu sk- ske skk skp skr sks skt sku sne snk snn snp snr sns snt snu spe spk spn spp spr sps spt spu sr- sre srk srn srp srr srs srt ss- sse ssk ssn ssp ssr sss sst ssu ste stk stn stp str sts stt stu sue suk sun sup sur sus sut suu te- tee tek ten tep ter tes tet teu tke tkk tkp tkr tks tkt tne tnk tnn tnp tnr tns tnt tpe tpk tpn tpp tpr tps tpt tpu tre trk trn trp trr trs trt tru tse tsk tsn tsp tsr tss tst tsu tte ttk ttn ttp ttr tts ttt ttu tue tuk tun tup tur tus tut tuu uee uen uep uer ues uet uke ukk ukn ukp ukr uku un- une unk unn unp unr uns unt unu up- upe upk upn upp upr ups upt upu ur- ure urk urn urp urr urs urt uru use usk usn usp usr uss ust usu ute utk utn utp utr uts utt utu uue uun uur uus uut uuu