-er c-- ccc cce cck ccm ccn ccr ce- cec cee cek cem cen cer ckc ckm cmc cme cmk cmm cmn cmr cn- cnc cne cnm cnn cnr crc cre crk crm crn crr ec- ecc ece eck ecm ecn ecr eec eee eek eem een eer ekc eke ekr em- emc eme emk emm emn emr en- enc ene enk enm enn enr erc ere erk erm ern err kcc kce kck kcm kcn kcr ke- kec kee kek kem ken ker kkc kke kkk kkm kkn kkr kmc kme kmk kmm kn- knc kne knk knm knn knr krc krk krn krr m-r mc- mcc mce mck mcm mcn mcr mec mee mek mem men mer mkc mke mkk mkm mkn mkr mmc mme mmk mmm mmn mmr mnc mne mnk mnm mnn mnr mrc mre mrk mrm mrn mrr ncc nce nck ncm ncn ncr ne- nec nee nek nem nen ner nkc nke nkk nkm nkn nkr nmc nme nmk nmm nmn nmr nnc nne nnk nnm nnn nrc nre nrk nrm nrn nrr rcc rce rcm rcn rcr re- rec ree rek rem ren rer rkc rke rkk rkm rmc rme rmm rmn rmr rnc rnm rnn rnr rrc rrk rrm rrn rrr