-er c-- ccc cce ccg ccm ccr ccu ce- cec cee ceg cem cer ceu cgc cge cgg cgm cgr cgu cmc cme cmg cmm cmr cmu crc cre crg crm crr cru cuc cue cug cum cur cuu ec- ecc ece ecg ecm ecr ecu eec eee eeg eem eer egc ege egg egm egr egu em- emc eme emg emm emr emu erc ere erg erm err eru eu- euc eue eug eur gcc gce gcg gcm gcr gcu ge- gec gee geg gem ger geu ggc ggg ggm ggr ggu gmc gme gmg gmm gmr grc gre grg grm grr gru gu- guc gue gug gum gur guu m-r mc- mcc mce mcg mcm mcr mcu mec mee meg mem mer meu mgc mge mgm mgr mgu mmc mme mmg mmm mmr mmu mrc mre mrg mrm mrr mru muc mue mug mum mur muu rcc rce rcg rcm rcr rcu re- rec ree reg rem rer reu rgc rge rgg rgr rmc rme rmg rmm rmr rrc rrg rrm rrr rru ruc rue rug rum rur ruu ucc uce ucg ucm ucr ucu uec uee ueg uem uer ugc uge ugg ugm ugr ugu um- umc ume umg umm umr umu ur- urc ure urg urm urr uru uuc uue uug uum uur uuu