-er c-- ccc cce cck ccn ccr ccu ce- cec cee cek cen cer ceu ckc cn- cnc cne cnn cnr cnu crc cre crk crn crr cru cuc cue cuk cun cur cuu ec- ecc ece eck ecn ecr ecu eec eee eek een eer ekc eke ekr eku en- enc ene enk enn enr enu erc ere erk ern err eru eu- euc eue eun eur kcc kce kck kcn kcr kcu ke- kec kee kek ken ker kkc kke kkk kkn kkr kku kn- knc kne knk knn knr knu krc krk krn krr kru kuc kue kuk kun kur kuu ncc nce nck ncn ncr ncu ne- nec nee nek nen ner neu nkc nke nkk nkn nkr nku nnc nne nnk nnn nnu nrc nre nrk nrn nrr nru nuc nue nuk nun nur nuu rcc rce rcn rcr rcu re- rec ree rek ren rer reu rkc rke rkk rku rnc rnn rnr rnu rrc rrk rrn rrr rru ruc rue ruk run rur ruu ucc uce uck ucn ucr ucu uec uee uen uer ukc uke ukk ukn ukr uku un- unc une unk unn unr unu ur- urc ure urk urn urr uru uuc uue uun uur uuu