-er -up eee eek een eeo eep eer eet eke eko ekp ekr ekt eku en- ene enk enn eno enp enr ent enu eo- eoe eok eon eoo eop eor eot eou ep- epe epn epo epp epr ept epu ere erk ern ero erp err ert eru ete etk etn eto etp etr ett etu eu- eue eun eup eur eut k-t ke- kee kek ken keo kep ker ket kke kkk kkn kkp kkr kkt kku kn- kne knk knn kno knp knr knt knu koe kok kon koo kop kor kot kou kpe kpk kpn kpo kpp kpr kpt kpu krk krn kro krp krr krt kru kte ktk ktn kto ktp ktr ktt ktu kue kuk kun kup kur kut kuu ne- nee nek nen neo nep ner net neu nke nkk nkn nko nkp nkr nkt nku nne nnk nnn nno nnp nnt nnu no- noe nok non noo nop nor not nou npe npn npo npp npr npt npu nre nrk nrn nro nrp nrr nrt nru nte ntk ntn nto ntp ntr ntt ntu nue nuk nun nuo nup nur nut nuu oee oen oeo oep oer oet oke okk oko okp okr oku on- one onk onn ono onp onr ont onu oo- ook oon ooo oop oor oot op- ope opk opn opo opp opr opt or- ore ork orn oro orp orr ort oru ot- ote otk otn oto otp otr ott otu ou- oue ouk oun ouo oup our out p-p pee pek pen peo pep per pet peu pke pkn pko pkp pkr pkt pku pn- pne pnk pnn pno pnp pnr pnt pnu poe pok pon poo pop por pot pou ppe ppk ppn ppo ppp ppr ppt ppu pre prk prn pro prp prr prt pru pt- pte ptk ptn pto ptp ptr ptt ptu pue puk pun pup pur put puu re- ree rek ren reo rep rer ret reu rke rkk rko rkp rkt rku rnn rno rnp rnr rnt rnu roe rok ron roo rop ror rot rou rpe rpk rpn rpo rpp rpr rpt rpu rrk rrn rrp rrr rrt rru rte rtk rtn rto rtp rtr rtt rtu rue ruk run ruo rup rur rut ruu te- tee tek ten teo tep ter tet teu tke tkk tko tkp tkr tkt tne tnk tnn tno tnp tnr tnt to- toe tok ton too top tor tot tou tpe tpk tpn tpo tpp tpr tpt tpu tre trk trn tro trp trr trt tru tte ttk ttn tto ttp ttr ttt ttu tue tuk tun tuo tup tur tut tuu uee uen uep uer uet uke ukk ukn ukp ukr uku un- une unk unn uno unp unr unt unu uoe uok uon uoo uop uor uot up- upe upk upn upo upp upr upt upu ur- ure urk urn uro urp urr urt uru ute utk utn uto utp utr utt utu uue uun uur uut uuu