-er -ic a-a a-c a-i aaa aac aae aai aak aar aas ac- aca acc ace aci ack acr acs aea aec aee aei aek aer aes ai- aia aic aie aii aik air ais aka akc ake aki akk akr aks ar- ara arc are ari ark arr ars as- asa asc ase asi ask asr ass c-- caa cac cae cai cak car cas cca ccc cce cci cck ccr ccs ce- cea cec cee cei cek cer ces ci- cia cic cie cii cik cir cis cka ckc cki cks cra crc cre cri crk crr crs csa csc cse csi csk csr css eaa eac eae eai eak ear eas ec- eca ecc ece eci eck ecr ecs eea eec eee eek eer ees eia eic eie eii eik eir eis eka ekc eke eki ekr eks era erc ere eri erk err ers es- esa esc ese esi esk esr ess ia- iaa iac iae iai iar ias ica icc ice ici ick icr ics ie- iea iec iee iei iek ier ies iia iic iie iii iir iis ika ikc ike iki ikk ikr iks ir- ira irc ire iri irk irr irs is- isa isc ise isi isk isr iss ka- kaa kac kae kai kak kar kas kca kcc kce kci kck kcr kcs ke- kea kec kee kei kek ker kes kia kic kie kii kik kir kis kkc kke kki kkk kkr kks kra krc kri krk krr krs ksa ksc kse ksi ksk ksr kss ra- raa rac rae rai rak rar ras rca rcc rce rci rcr rcs re- rea rec ree rei rek rer res ria ric rie rii rik rir ris rkc rke rkk rks rra rrc rri rrk rrr rrs rsa rsc rse rsi rsk rsr rss saa sac sae sai sak sar sas sca scc sce sci sck scr scs se- sea sec see sei sek ser ses sia sic sie sii sik sir sis sk- ska skc ske ski skk skr sks sr- sra src sre sri srk srr srs ss- ssa ssc sse ssi ssk ssr sss