-er -ic a-a a-c a-i aaa aac aae aaf aai aak aan aap aar ac- aca acc ace acf aci ack acn acp acr aea aec aee aef aei aek aen aep aer af- afa afc afe aff afi afk afn afp afr ai- aia aic aie aif aii aik ain aip air aka akc ake aki akk akn akp akr an- ana anc ane anf ani ank ann anp anr ap- apa apc ape apf api apk apn app apr ar- ara arc are arf ari ark arn arp arr c-- caa cac cae caf cai cak can cap car cca ccc cce ccf cci cck ccn ccp ccr ce- cea cec cee cef cei cek cen cep cer cfa cfc cfe cff cfi cfk cfn cfp cfr ci- cia cic cie cif cii cik cin cip cir cka ckc cki cn- cna cnc cne cnf cni cnn cnp cnr cpa cpc cpe cpf cpi cpk cpn cpp cpr cra crc cre crf cri crk crn crp crr eaa eac eae eaf eai eak ean eap ear ec- eca ecc ece ecf eci eck ecn ecr eea eec eee eef eek een eep eer ef- efa efc efe eff efi efp efr eia eic eie eif eii eik ein eip eir eka ekc eke ekf eki ekp ekr en- ena enc ene enf eni enk enn enp enr ep- epa epc epe epf epi epn epp epr era erc ere erf eri erk ern erp err faa fac fae faf fai fak fan fap far fca fcc fce fcf fci fck fcn fcp fcr fea fec fee fef fei fek fen fep fer ffa ffc ffe fff ffi ffk ffn ffp ffr fia fic fie fif fii fik fin fip fir fka fkc fkf fki fkk fkp fna fnc fne fnf fni fnk fnn fnp fnr fpa fpc fpe fpi fpk fpn fpp fpr fra frc fre frf fri frk frn frp frr i-f ia- iaa iac iae iaf iai ian iap iar ica icc ice icf ici ick icn icp icr ie- iea iec iee ief iei iek ien iep ier ifa ifc ife iff ifi ifn ifp ifr iia iic iie iif iii iin iip iir ika ikc ike ikf iki ikk ikr in- ina inc ine inf ini ink inn inp inr ipa ipc ipe ipf ipi ipn ipp ipr ir- ira irc ire irf iri irk irn irp irr ka- kaa kac kae kaf kai kak kan kap kar kca kcc kce kci kck kcn kcp kcr ke- kea kec kee kef kei kek ken kep ker kfa kfc kff kfi kia kic kie kif kii kik kin kip kir kkc kke kki kkk kkn kkp kkr kn- kna knc kne knf kni knk knn knp knr kpa kpc kpe kpf kpi kpk kpn kpp kpr kra krc krf kri krk krn krp krr n-i naa nac nae naf nai nak nan nap nar nca ncc nce ncf nci nck ncn ncp ncr ne- nea nec nee nef nei nek nen nep ner nfa nfc nfe nff nfi nfk nfn nfp nfr nia nic nie nif nii nik nin nip nir nka nkc nke nkf nki nkk nkn nkp nkr nna nnc nne nnf nni nnk nnn nnp npa npc npe npf npi npn npp npr nra nrc nre nrf nri nrk nrn nrp nrr p-p paa pac pae paf pai pak pan pap par pca pcc pce pcf pci pck pcn pcp pcr pea pec pee pef pei pek pen pep per pfa pfc pfe pff pfi pfk pfn pfp pfr pia pic pie pif pii pik pin pip pir pka pkc pke pkf pki pkn pkp pkr pn- pna pnc pne pnf pni pnk pnn pnp pnr ppa ppc ppe ppf ppi ppk ppn ppp ppr pra prc pre prf pri prk prn prp prr ra- raa rac rae raf rai rak ran rap rar rca rcc rce rcf rci rcn rcp rcr re- rea rec ree ref rei rek ren rep rer rfa rfc rfe rff rfi rfk rfn rfp rfr ria ric rie rif rii rik rin rip rir rkc rke rkf rkk rkp rna rnc rni rnn rnp rnr rpa rpc rpe rpf rpi rpk rpn rpp rpr rra rrc rrf rri rrk rrn rrp rrr