-er -ic a-a a-c a-i aaa aac aae aai aak aap aar ac- aca acc ace aci ack acp acr aea aec aee aei aek aep aer ai- aia aic aie aii aik aip air aka akc ake aki akk akp akr ap- apa apc ape api apk app apr ar- ara arc are ari ark arp arr c-- caa cac cae cai cak cap car cca ccc cce cci cck ccp ccr ce- cea cec cee cei cek cep cer ci- cia cic cie cii cik cip cir cka ckc cki cpa cpc cpe cpi cpk cpp cpr cra crc cre cri crk crp crr eaa eac eae eai eak eap ear ec- eca ecc ece eci eck ecr eea eec eee eek eep eer eia eic eie eii eik eip eir eka ekc eke eki ekp ekr ep- epa epc epe epi epp epr era erc ere eri erk erp err ia- iaa iac iae iai iap iar ica icc ice ici ick icp icr ie- iea iec iee iei iek iep ier iia iic iie iii iip iir ika ikc ike iki ikk ikr ipa ipc ipe ipi ipp ipr ir- ira irc ire iri irk irp irr ka- kaa kac kae kai kak kap kar kca kcc kce kci kck kcp kcr ke- kea kec kee kei kek kep ker kia kic kie kii kik kip kir kkc kke kki kkk kkp kkr kpa kpc kpe kpi kpk kpp kpr kra krc kri krk krp krr p-p paa pac pae pai pak pap par pca pcc pce pci pck pcp pcr pea pec pee pei pek pep per pia pic pie pii pik pip pir pka pkc pke pki pkp pkr ppa ppc ppe ppi ppk ppp ppr pra prc pre pri prk prp prr ra- raa rac rae rai rak rap rar rca rcc rce rci rcp rcr re- rea rec ree rei rek rep rer ria ric rie rii rik rip rir rkc rke rkk rkp rpa rpc rpe rpi rpk rpp rpr rra rrc rri rrk rrp rrr