-er c-- ccc cce ccl ccm ccr ccu ce- cec cee cel cem cer ceu cl- clc cle cll clm clr clu cmc cme cml cmm cmr cmu crc cre crl crm crr cru cuc cue cul cum cur cuu ec- ecc ece ecl ecm ecr ecu eec eee eel eem eer elc ele ell elm elr elu em- emc eme eml emm emr emu erc ere erl erm err eru eu- euc eue eul eur lcc lce lcl lcm lcr lcu lec lee lel lem ler leu llc lle lll llm llr llu lmc lme lml lmm lmr lmu lrc lrm lrr lru luc lue lul lum lur luu m-r mc- mcc mce mcl mcm mcr mcu mec mee mel mem mer meu mlc mle mll mlm mlr mlu mmc mme mml mmm mmr mmu mrc mre mrl mrm mrr mru muc mue mul mum mur muu rcc rce rcl rcm rcr rcu re- rec ree rel rem rer reu rlc rle rll rlm rlr rlu rmc rme rml rmm rmr rrc rrl rrm rrr rru ruc rue rum rur ruu ucc uce ucl ucm ucr ucu uec uee uel uem uer ulc ule ull ulm ulr ulu um- umc ume uml umm umr umu ur- urc ure url urm urr uru uuc uue uum uur uuu