-er -up c-- ccc cce ccn cco ccp ccr ccu ce- cec cee cen ceo cep ceq cer ceu cn- cnc cne cnn cno cnp cnr cnu co- coc coe con coo cop coq cor cou cpc cpe cpn cpo cpp cpq cpr cpu cqc cqo crc cre crn cro crp crq crr cru cuc cue cun cuo cup cuq cur cuu ec- ecc ece ecn eco ecq ecr ecu eec eee een eeo eep eer en- enc ene enn eno enp enr enu eo- eoc eoe eon eoo eop eoq eor eou ep- epc epe epn epo epp epq epr epu eqe eqn eqp eqq equ erc ere ern ero erp erq err eru eu- euc eue eun eup eur ncc nce ncn nco ncp ncr ncu ne- nec nee nen neo nep ner neu nnc nne nnn nno nnp nnu no- noc noe non noo nop nor nou npc npe npn npo npp npr npu nqc nrc nre nrn nro nrp nrr nru nuc nue nun nuo nup nuq nur nuu oc- occ ocn oco ocp ocr ocu oec oee oen oeo oep oer on- onc one onn ono onp onr onu oo- ooc oon ooo oop oor op- opc ope opn opo opp opq opr oqo or- orc ore orn oro orp orr oru ou- ouc oue oun ouo oup our p-p pcc pce pcn pco pcp pcq pcr pcu pec pee pen peo pep per peu pn- pnc pne pnn pno pnp pnr pnu poc poe pon poo pop por pou ppc ppe ppn ppo ppp ppq ppr ppu pqq pqr prc pre prn pro prp prq prr pru puc pue pun pup pur puu qcc qco qcp qec qee qen qeo qep qne qoo qop qor qpc qpp qpr qqq qqu qrc qre qrp qru qu- que quo qur rcc rce rcn rco rcp rcr rcu re- rec ree ren reo rep req rer reu rnc rnn rno rnp rnr rnu roc roe ron roo rop ror rou rpc rpe rpn rpo rpp rpr rpu rqc rqn rrc rrn rrp rrq rrr rru ruc rue run ruo rup rur ruu ucc uce ucn uco ucp ucr ucu uec uee uen uep uer un- unc une unn uno unp unq unr unu uoc uoe uon uoo uop uor up- upc upe upn upo upp upr upu ur- urc ure urn uro urp urr uru uuc uue uun uur uuu