-er -up c-- ccc cce cck ccn cco ccp ccr ccu ce- cec cee cek cen ceo cep cer ceu ckc cko cn- cnc cne cnn cno cnp cnr cnu co- coc coe cok con coo cop cor cou cpc cpe cpk cpn cpo cpp cpr cpu crc cre crk crn cro crp crr cru cuc cue cuk cun cuo cup cur cuu ec- ecc ece eck ecn eco ecr ecu eec eee eek een eeo eep eer ekc eke eko ekp ekr eku en- enc ene enk enn eno enp enr enu eo- eoc eoe eok eon eoo eop eor eou ep- epc epe epn epo epp epr epu erc ere erk ern ero erp err eru eu- euc eue eun eup eur kcc kce kck kcn kcp kcr kcu ke- kec kee kek ken keo kep ker kkc kke kkk kkn kkp kkr kku kn- knc kne knk knn kno knp knr knu koc koe kok kon koo kop kor kou kpc kpe kpk kpn kpo kpp kpr kpu krc krk krn kro krp krr kru kuc kue kuk kun kup kur kuu ncc nce nck ncn nco ncp ncr ncu ne- nec nee nek nen neo nep ner neu nkc nke nkk nkn nko nkp nkr nku nnc nne nnk nnn nno nnp nnu no- noc noe nok non noo nop nor nou npc npe npn npo npp npr npu nrc nre nrk nrn nro nrp nrr nru nuc nue nuk nun nuo nup nur nuu oc- occ ock ocn oco ocp ocr ocu oec oee oen oeo oep oer okc oke okk oko okp okr oku on- onc one onk onn ono onp onr onu oo- ooc ook oon ooo oop oor op- opc ope opk opn opo opp opr or- orc ore ork orn oro orp orr oru ou- ouc oue ouk oun ouo oup our p-p pcc pce pck pcn pco pcp pcr pcu pec pee pek pen peo pep per peu pkc pke pkn pko pkp pkr pku pn- pnc pne pnk pnn pno pnp pnr pnu poc poe pok pon poo pop por pou ppc ppe ppk ppn ppo ppp ppr ppu prc pre prk prn pro prp prr pru puc pue puk pun pup pur puu rcc rce rcn rco rcp rcr rcu re- rec ree rek ren reo rep rer reu rkc rke rkk rko rkp rku rnc rnn rno rnp rnr rnu roc roe rok ron roo rop ror rou rpc rpe rpk rpn rpo rpp rpr rpu rrc rrk rrn rrp rrr rru ruc rue ruk run ruo rup rur ruu ucc uce uck ucn uco ucp ucr ucu uec uee uen uep uer ukc uke ukk ukn ukp ukr uku un- unc une unk unn uno unp unr unu uoc uoe uok uon uoo uop uor up- upc upe upk upn upo upp upr upu ur- urc ure urk urn uro urp urr uru uuc uue uun uur uuu