-er -up c-- ccc cce cck ccn ccp ccr ccu ce- cec cee cek cen cep cer ceu ckc cn- cnc cne cnn cnp cnr cnu cpc cpe cpk cpn cpp cpr cpu crc cre crk crn crp crr cru cuc cue cuk cun cup cur cuu ec- ecc ece eck ecn ecr ecu eec eee eek een eep eer ekc eke ekp ekr eku en- enc ene enk enn enp enr enu ep- epc epe epn epp epr epu erc ere erk ern erp err eru eu- euc eue eun eup eur kcc kce kck kcn kcp kcr kcu ke- kec kee kek ken kep ker kkc kke kkk kkn kkp kkr kku kn- knc kne knk knn knp knr knu kpc kpe kpk kpn kpp kpr kpu krc krk krn krp krr kru kuc kue kuk kun kup kur kuu ncc nce nck ncn ncp ncr ncu ne- nec nee nek nen nep ner neu nkc nke nkk nkn nkp nkr nku nnc nne nnk nnn nnp nnu npc npe npn npp npr npu nrc nre nrk nrn nrp nrr nru nuc nue nuk nun nup nur nuu p-p pcc pce pck pcn pcp pcr pcu pec pee pek pen pep per peu pkc pke pkn pkp pkr pku pn- pnc pne pnk pnn pnp pnr pnu ppc ppe ppk ppn ppp ppr ppu prc pre prk prn prp prr pru puc pue puk pun pup pur puu rcc rce rcn rcp rcr rcu re- rec ree rek ren rep rer reu rkc rke rkk rkp rku rnc rnn rnp rnr rnu rpc rpe rpk rpn rpp rpr rpu rrc rrk rrn rrp rrr rru ruc rue ruk run rup rur ruu ucc uce uck ucn ucp ucr ucu uec uee uen uep uer ukc uke ukk ukn ukp ukr uku un- unc une unk unn unp unr unu up- upc upe upk upn upp upr upu ur- urc ure urk urn urp urr uru uuc uue uun uur uuu