-er c-- ccc cce ccf cck ccn cco ccr ccu ce- cec cee cef cek cen ceo cer ceu cfc cfe cff cfk cfn cfo cfr cfu ckc cko cn- cnc cne cnf cnn cno cnr cnu co- coc coe cof cok con coo cor cou crc cre crf crk crn cro crr cru cuc cue cuf cuk cun cuo cur cuu ec- ecc ece ecf eck ecn eco ecr ecu eec eee eef eek een eeo eer ef- efc efe eff efo efr ekc eke ekf eko ekr eku en- enc ene enf enk enn eno enr enu eo- eoc eoe eof eok eon eoo eor eou erc ere erf erk ern ero err eru eu- euc eue euf eun eur fcc fce fcf fck fcn fco fcr fcu fec fee fef fek fen feo fer feu ffc ffe fff ffk ffn ffo ffr ffu fkc fkf fkk fnc fne fnf fnk fnn fnr fnu foc foe fof fok fon foo for fou frc fre frf frk frn fro frr fru fue fuf fuk fun fuo fur fuu kcc kce kck kcn kcr kcu ke- kec kee kef kek ken keo ker kfc kff kfo kfu kkc kke kkk kkn kkr kku kn- knc kne knf knk knn kno knr knu koc koe kof kok kon koo kor kou krc krf krk krn kro krr kru kuc kue kuk kun kur kuu ncc nce ncf nck ncn nco ncr ncu ne- nec nee nef nek nen neo ner neu nfc nfe nff nfk nfn nfo nfr nfu nkc nke nkf nkk nkn nko nkr nku nnc nne nnf nnk nnn nno nnu no- noc noe nof nok non noo nor nou nrc nre nrf nrk nrn nro nrr nru nuc nue nuk nun nuo nur nuu oc- occ ocf ock ocn oco ocr ocu oec oee oef oen oeo oer of- ofc ofe off ofn ofo ofr ofu okc oke okk oko okr oku on- onc one onf onk onn ono onr onu oo- ooc oof ook oon ooo oor or- orc ore orf ork orn oro orr oru ou- ouc oue ouf ouk oun ouo our rcc rce rcf rcn rco rcr rcu re- rec ree ref rek ren reo rer reu rfc rfe rff rfk rfn rfo rfr rfu rkc rke rkf rkk rko rku rnc rnn rno rnr rnu roc roe rof rok ron roo ror rou rrc rrf rrk rrn rrr rru ruc rue ruf ruk run ruo rur ruu ucc uce ucf uck ucn uco ucr ucu uec uee uef uen uer ufc ufe uff ufn ufo ufr ufu ukc uke ukf ukk ukn ukr uku un- unc une unf unk unn uno unr unu uoc uoe uok uon uoo uor ur- urc ure urf urk urn uro urr uru uuc uue uun uur uuu