-er -ic c-- ccc cce ccg cci cck ccr ccu ce- cec cee ceg cei cek cer ceu cgc cge cgg cgi cgr cgu ci- cic cie cig cii cik cir ciu ckc cki crc cre crg cri crk crr cru cuc cue cug cui cuk cur cuu ec- ecc ece ecg eci eck ecr ecu eec eee eeg eek eer egc ege egg egi egr egu eic eie eig eii eik eir eiu ekc eke ekg eki ekr eku erc ere erg eri erk err eru eu- euc eue eug eui eur gcc gce gcg gci gck gcr gcu ge- gec gee geg gei gek ger geu ggc ggg ggi ggr ggu gic gie gig gii gik gir giu grc gre grg gri grk grr gru gu- guc gue gug gui guk gur guu icc ice icg ici ick icr icu ie- iec iee ieg iei iek ier igc ige igg igi igk igr igu iic iie iii iir iiu ikc ike iki ikk ikr iku ir- irc ire irg iri irk irr iru iu- iuc iue iug iui iur kcc kce kcg kci kck kcr kcu ke- kec kee keg kei kek ker kgc kgi kgu kic kie kig kii kik kir kiu kkc kke kki kkk kkr kku krc krg kri krk krr kru kuc kue kug kui kuk kur kuu rcc rce rcg rci rcr rcu re- rec ree reg rei rek rer reu rgc rge rgg rgi rgk rgr ric rie rig rii rik rir rkc rke rkg rkk rku rrc rrg rri rrk rrr rru ruc rue rug rui ruk rur ruu ucc uce ucg uci uck ucr ucu uec uee ueg uei uer ugc uge ugg ugi ugk ugr ugu uic uie uig uii uir uiu ukc uke uki ukk ukr uku ur- urc ure urg uri urk urr uru uuc uue uug uur uuu