-er -ic a-a a-c a-i aaa aac aae aai aak aap aar aas ac- aca acc ace aci ack acp acr acs aea aec aee aei aek aep aer aes ai- aia aic aie aii aik aip air ais aka akc ake aki akk akp akr aks ap- apa apc ape api apk app apr aps ar- ara arc are ari ark arp arr ars as- asa asc ase asi ask asp asr ass c-- caa cac cae cai cak cap car cas cca ccc cce cci cck ccp ccr ccs ce- cea cec cee cei cek cep cer ces ci- cia cic cie cii cik cip cir cis cka ckc cki cks cpa cpc cpe cpi cpk cpp cpr cps cra crc cre cri crk crp crr crs csa csc cse csi csk csp csr css eaa eac eae eai eak eap ear eas ec- eca ecc ece eci eck ecr ecs eea eec eee eek eep eer ees eia eic eie eii eik eip eir eis eka ekc eke eki ekp ekr eks ep- epa epc epe epi epp epr eps era erc ere eri erk erp err ers es- esa esc ese esi esk esp esr ess ia- iaa iac iae iai iap iar ias ica icc ice ici ick icp icr ics ie- iea iec iee iei iek iep ier ies iia iic iie iii iip iir iis ika ikc ike iki ikk ikr iks ipa ipc ipe ipi ipp ipr ips ir- ira irc ire iri irk irp irr irs is- isa isc ise isi isk isp isr iss ka- kaa kac kae kai kak kap kar kas kca kcc kce kci kck kcp kcr kcs ke- kea kec kee kei kek kep ker kes kia kic kie kii kik kip kir kis kkc kke kki kkk kkp kkr kks kpa kpc kpe kpi kpk kpp kpr kps kra krc kri krk krp krr krs ksa ksc kse ksi ksk ksp ksr kss p-p paa pac pae pai pak pap par pas pca pcc pce pci pck pcp pcr pcs pea pec pee pei pek pep per pes pia pic pie pii pik pip pir pis pka pkc pke pki pkp pkr pks ppa ppc ppe ppi ppk ppp ppr pps pra prc pre pri prk prp prr prs ps- psa psc pse psi psk psp psr pss ra- raa rac rae rai rak rap rar ras rca rcc rce rci rcp rcr rcs re- rea rec ree rei rek rep rer res ria ric rie rii rik rip rir ris rkc rke rkk rkp rks rpa rpc rpe rpi rpk rpp rpr rps rra rrc rri rrk rrp rrr rrs rsa rsc rse rsi rsk rsp rsr rss saa sac sae sai sak sap sar sas sca scc sce sci sck scp scr scs se- sea sec see sei sek sep ser ses sia sic sie sii sik sip sir sis sk- ska skc ske ski skk skp skr sks spa spc spe spi spk spp spr sps sr- sra src sre sri srk srp srr srs ss- ssa ssc sse ssi ssk ssp ssr sss