-er c-- ccc cce cck ccl ccm ccr ce- cec cee cek cel cem cer ckc ckm cl- clc cle clk cll clm clr cmc cme cmk cml cmm cmr crc cre crk crl crm crr ec- ecc ece eck ecl ecm ecr eec eee eek eel eem eer ekc eke ekl ekr elc ele elk ell elm elr em- emc eme emk eml emm emr erc ere erk erl erm err kcc kce kck kcl kcm kcr ke- kec kee kek kel kem ker kkc kke kkk kkl kkm kkr kl- klc klm klr kmc kme kmk kml kmm krc krk krl krr lcc lce lck lcl lcm lcr lec lee lek lel lem ler lkl lkr llc lle llk lll llm llr lmc lme lmk lml lmm lmr lrc lrk lrm lrr m-r mc- mcc mce mck mcl mcm mcr mec mee mek mel mem mer mkc mke mkk mkl mkm mkr mlc mle mlk mll mlm mlr mmc mme mmk mml mmm mmr mrc mre mrk mrl mrm mrr rcc rce rcl rcm rcr re- rec ree rek rel rem rer rkc rke rkk rkm rlc rle rll rlm rlr rmc rme rml rmm rmr rrc rrk rrl rrm rrr