-er c-- ccc cce ccl ccm ccr ce- cec cee cel cem cer cl- clc cle cll clm clr cmc cme cml cmm cmr crc cre crl crm crr ec- ecc ece ecl ecm ecr eec eee eel eem eer elc ele ell elm elr em- emc eme eml emm emr erc ere erl erm err lcc lce lcl lcm lcr lec lee lel lem ler llc lle lll llm llr lmc lme lml lmm lmr lrc lrm lrr m-r mc- mcc mce mcl mcm mcr mec mee mel mem mer mlc mle mll mlm mlr mmc mme mml mmm mmr mrc mre mrl mrm mrr rcc rce rcl rcm rcr re- rec ree rel rem rer rlc rle rll rlm rlr rmc rme rml rmm rmr rrc rrl rrm rrr