-er c-- ccc ccd cce ccf cck ccn ccr ccu cdc cdd cde cdf cdk cdn cdr cdu ce- cec ced cee cef cek cen cer ceu cfc cfd cfe cff cfk cfn cfr cfu ckc ckd cn- cnc cnd cne cnf cnn cnr cnu crc crd cre crf crk crn crr cru cuc cud cue cuf cuk cun cur cuu dcc dcd dce dcf dck dcn dcr dcu ddc ddd dde ddf ddk ddn ddr ddu de- dec ded dee def dek den der deu dfc dfd dfe dff dfk dfn dfr dfu dkc dke dkk dkr dku dnc dnd dne dnf dnk dnn dnr drc drd dre drk drn drr dru duc dud due duf duk dun dur ec- ecc ecd ece ecf eck ecn ecr ecu ed- edc edd ede edf edk edn edr edu eec eed eee eef eek een eer ef- efc efd efe eff efr ekc ekd eke ekf ekr eku en- enc end ene enf enk enn enr enu erc erd ere erf erk ern err eru eu- euc eud eue euf eun eur fcc fcd fce fcf fck fcn fcr fcu fdc fdd fde fdf fdk fdn fdr fdu fec fed fee fef fek fen fer feu ffc ffd ffe fff ffk ffn ffr ffu fkc fkf fkk fnc fnd fne fnf fnk fnn fnr fnu frc frd fre frf frk frn frr fru fud fue fuf fuk fun fur fuu kcc kcd kce kck kcn kcr kcu kdc kde kdf kdk kdr kdu ke- kec ked kee kef kek ken ker kfc kfd kff kfu kkc kke kkk kkn kkr kku kn- knc knd kne knf knk knn knr knu krc krd krf krk krn krr kru kuc kud kue kuk kun kur kuu ncc ncd nce ncf nck ncn ncr ncu ndc ndd nde ndf ndk ndn ndr ndu ne- nec ned nee nef nek nen ner neu nfc nfd nfe nff nfk nfn nfr nfu nkc nke nkf nkk nkn nkr nku nnc nne nnf nnk nnn nnu nrc nrd nre nrf nrk nrn nrr nru nuc nud nue nuk nun nur nuu rcc rcd rce rcf rcn rcr rcu rdc rdd rde rdf rdn rdr rdu re- rec red ree ref rek ren rer reu rfc rfd rfe rff rfk rfn rfr rfu rkc rke rkf rkk rku rnc rnd rnn rnr rnu rrc rrd rrf rrk rrn rrr rru ruc rud rue ruf ruk run rur ruu ucc ucd uce ucf uck ucn ucr ucu udc udd ude udf udk udn udr udu uec ued uee uef uen uer ufc ufd ufe uff ufn ufr ufu ukc uke ukf ukk ukn ukr uku un- unc und une unf unk unn unr unu ur- urc urd ure urf urk urn urr uru uuc uue uun uur uuu