-er -ic a-a a-c a-i aaa aac aae aai aak aan aap aar ac- aca acc ace aci ack acn acp acr aea aec aee aei aek aen aep aer ai- aia aic aie aii aik ain aip air aka akc ake aki akk akn akp akr an- ana anc ane ani ank ann anp anr ap- apa apc ape api apk apn app apr ar- ara arc are ari ark arn arp arr c-- caa cac cae cai cak can cap car cca ccc cce cci cck ccn ccp ccr ce- cea cec cee cei cek cen cep cer ci- cia cic cie cii cik cin cip cir cka ckc cki cn- cna cnc cne cni cnn cnp cnr cpa cpc cpe cpi cpk cpn cpp cpr cra crc cre cri crk crn crp crr eaa eac eae eai eak ean eap ear ec- eca ecc ece eci eck ecn ecr eea eec eee eek een eep eer eia eic eie eii eik ein eip eir eka ekc eke eki ekp ekr en- ena enc ene eni enk enn enp enr ep- epa epc epe epi epn epp epr era erc ere eri erk ern erp err ia- iaa iac iae iai ian iap iar ica icc ice ici ick icn icp icr ie- iea iec iee iei iek ien iep ier iia iic iie iii iin iip iir ika ikc ike iki ikk ikr in- ina inc ine ini ink inn inp inr ipa ipc ipe ipi ipn ipp ipr ir- ira irc ire iri irk irn irp irr ka- kaa kac kae kai kak kan kap kar kca kcc kce kci kck kcn kcp kcr ke- kea kec kee kei kek ken kep ker kia kic kie kii kik kin kip kir kkc kke kki kkk kkn kkp kkr kn- kna knc kne kni knk knn knp knr kpa kpc kpe kpi kpk kpn kpp kpr kra krc kri krk krn krp krr n-i naa nac nae nai nak nan nap nar nca ncc nce nci nck ncn ncp ncr ne- nea nec nee nei nek nen nep ner nia nic nie nii nik nin nip nir nka nkc nke nki nkk nkn nkp nkr nna nnc nne nni nnk nnn nnp npa npc npe npi npn npp npr nra nrc nre nri nrk nrn nrp nrr p-p paa pac pae pai pak pan pap par pca pcc pce pci pck pcn pcp pcr pea pec pee pei pek pen pep per pia pic pie pii pik pin pip pir pka pkc pke pki pkn pkp pkr pn- pna pnc pne pni pnk pnn pnp pnr ppa ppc ppe ppi ppk ppn ppp ppr pra prc pre pri prk prn prp prr ra- raa rac rae rai rak ran rap rar rca rcc rce rci rcn rcp rcr re- rea rec ree rei rek ren rep rer ria ric rie rii rik rin rip rir rkc rke rkk rkp rna rnc rni rnn rnp rnr rpa rpc rpe rpi rpk rpn rpp rpr rra rrc rri rrk rrn rrp rrr