-er -ic a-a a-c a-i aaa aac aae aaf aai aak aan aar ac- aca acc ace acf aci ack acn acr aea aec aee aef aei aek aen aer af- afa afc afe aff afi afk afn afr ai- aia aic aie aif aii aik ain air aka akc ake aki akk akn akr an- ana anc ane anf ani ank ann anr ar- ara arc are arf ari ark arn arr c-- caa cac cae caf cai cak can car cca ccc cce ccf cci cck ccn ccr ce- cea cec cee cef cei cek cen cer cfa cfc cfe cff cfi cfk cfn cfr ci- cia cic cie cif cii cik cin cir cka ckc cki cn- cna cnc cne cnf cni cnn cnr cra crc cre crf cri crk crn crr eaa eac eae eaf eai eak ean ear ec- eca ecc ece ecf eci eck ecn ecr eea eec eee eef eek een eer ef- efa efc efe eff efi efr eia eic eie eif eii eik ein eir eka ekc eke ekf eki ekr en- ena enc ene enf eni enk enn enr era erc ere erf eri erk ern err faa fac fae faf fai fak fan far fca fcc fce fcf fci fck fcn fcr fea fec fee fef fei fek fen fer ffa ffc ffe fff ffi ffk ffn ffr fia fic fie fif fii fik fin fir fka fkc fkf fki fkk fna fnc fne fnf fni fnk fnn fnr fra frc fre frf fri frk frn frr i-f ia- iaa iac iae iaf iai ian iar ica icc ice icf ici ick icn icr ie- iea iec iee ief iei iek ien ier ifa ifc ife iff ifi ifn ifr iia iic iie iif iii iin iir ika ikc ike ikf iki ikk ikr in- ina inc ine inf ini ink inn inr ir- ira irc ire irf iri irk irn irr ka- kaa kac kae kaf kai kak kan kar kca kcc kce kci kck kcn kcr ke- kea kec kee kef kei kek ken ker kfa kfc kff kfi kia kic kie kif kii kik kin kir kkc kke kki kkk kkn kkr kn- kna knc kne knf kni knk knn knr kra krc krf kri krk krn krr n-i naa nac nae naf nai nak nan nar nca ncc nce ncf nci nck ncn ncr ne- nea nec nee nef nei nek nen ner nfa nfc nfe nff nfi nfk nfn nfr nia nic nie nif nii nik nin nir nka nkc nke nkf nki nkk nkn nkr nna nnc nne nnf nni nnk nnn nra nrc nre nrf nri nrk nrn nrr ra- raa rac rae raf rai rak ran rar rca rcc rce rcf rci rcn rcr re- rea rec ree ref rei rek ren rer rfa rfc rfe rff rfi rfk rfn rfr ria ric rie rif rii rik rin rir rkc rke rkf rkk rna rnc rni rnn rnr rra rrc rrf rri rrk rrn rrr