-er c-- ccc cce ccf cck ccn ccr ccu ce- cec cee cef cek cen cer ceu cfc cfe cff cfk cfn cfr cfu ckc cn- cnc cne cnf cnn cnr cnu crc cre crf crk crn crr cru cuc cue cuf cuk cun cur cuu ec- ecc ece ecf eck ecn ecr ecu eec eee eef eek een eer ef- efc efe eff efr ekc eke ekf ekr eku en- enc ene enf enk enn enr enu erc ere erf erk ern err eru eu- euc eue euf eun eur fcc fce fcf fck fcn fcr fcu fec fee fef fek fen fer feu ffc ffe fff ffk ffn ffr ffu fkc fkf fkk fnc fne fnf fnk fnn fnr fnu frc fre frf frk frn frr fru fue fuf fuk fun fur fuu kcc kce kck kcn kcr kcu ke- kec kee kef kek ken ker kfc kff kfu kkc kke kkk kkn kkr kku kn- knc kne knf knk knn knr knu krc krf krk krn krr kru kuc kue kuk kun kur kuu ncc nce ncf nck ncn ncr ncu ne- nec nee nef nek nen ner neu nfc nfe nff nfk nfn nfr nfu nkc nke nkf nkk nkn nkr nku nnc nne nnf nnk nnn nnu nrc nre nrf nrk nrn nrr nru nuc nue nuk nun nur nuu rcc rce rcf rcn rcr rcu re- rec ree ref rek ren rer reu rfc rfe rff rfk rfn rfr rfu rkc rke rkf rkk rku rnc rnn rnr rnu rrc rrf rrk rrn rrr rru ruc rue ruf ruk run rur ruu ucc uce ucf uck ucn ucr ucu uec uee uef uen uer ufc ufe uff ufn ufr ufu ukc uke ukf ukk ukn ukr uku un- unc une unf unk unn unr unu ur- urc ure urf urk urn urr uru uuc uue uun uur uuu