-er -ic a-a a-b a-c a-i aaa aab aac aae aaf aai aak aan aar ab- aba abb abc abe abf abi abk abn abr ac- aca acb acc ace acf aci ack acn acr aea aeb aec aee aef aei aek aen aer af- afa afb afc afe aff afi afk afn afr ai- aia aib aic aie aif aii aik ain air aka akb akc ake aki akk akn akr an- ana anb anc ane anf ani ank ann anr ar- ara arb arc are arf ari ark arn arr baa bab bac bae baf bai bak ban bar bba bbb bbc bbe bbf bbi bbk bbn bbr bca bcb bcc bce bcf bci bck bcn bcr be- bea beb bec bee bef bei bek ben ber bfa bfb bfc bfe bff bfi bfn bfr bi- bia bib bic bie bif bii bik bin bir bka bkb bkc bke bkf bkk bkn bkr bna bnb bnc bne bnf bni bnk bnn bnr bra brb bre brf bri brk brn brr c-- caa cab cac cae caf cai cak can car cba cbb cbc cbe cbf cbi cbk cbn cbr cca ccb ccc cce ccf cci cck ccn ccr ce- cea ceb cec cee cef cei cek cen cer cfa cfb cfc cfe cff cfi cfk cfn cfr ci- cia cib cic cie cif cii cik cin cir cka ckb ckc cki cn- cna cnb cnc cne cnf cni cnn cnr cra crb crc cre crf cri crk crn crr eaa eab eac eae eaf eai eak ean ear eba ebb ebc ebe ebf ebi ebk ebn ebr ec- eca ecb ecc ece ecf eci eck ecn ecr eea eeb eec eee eef eek een eer ef- efa efb efc efe eff efi efr eia eib eic eie eif eii eik ein eir eka ekb ekc eke ekf eki ekr en- ena enb enc ene enf eni enk enn enr era erb erc ere erf eri erk ern err faa fab fac fae faf fai fak fan far fba fbb fbc fbe fbf fbi fbk fbn fbr fca fcb fcc fce fcf fci fck fcn fcr fea feb fec fee fef fei fek fen fer ffa ffc ffe fff ffi ffk ffn ffr fia fib fic fie fif fii fik fin fir fka fkb fkc fkf fki fkk fna fnb fnc fne fnf fni fnk fnn fnr fra frb frc fre frf fri frk frn frr i-f ia- iaa iab iac iae iaf iai ian iar iba ibb ibc ibe ibf ibi ibk ibn ibr ica icb icc ice icf ici ick icn icr ie- iea iec iee ief iei iek ien ier ifa ifb ifc ife iff ifi ifn ifr iia iib iic iie iif iii iin iir ika ikb ikc ike ikf iki ikk ikr in- ina inb inc ine inf ini ink inn inr ir- ira irb irc ire irf iri irk irn irr ka- kaa kab kac kae kaf kai kak kan kar kba kbb kbc kbe kbf kbi kbk kbn kbr kca kcb kcc kce kci kck kcn kcr ke- kea keb kec kee kef kei kek ken ker kfa kfc kff kfi kia kib kic kie kif kii kik kin kir kkb 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 nab nac nae naf nai nak nan nar nba nbb nbc nbe nbf nbi nbk nbn nbr nca ncb ncc nce ncf nci nck ncn ncr ne- nea neb nec nee nef nei nek nen ner nfa nfb nfc nfe nff nfi nfk nfn nfr nia nib nic nie nif nii nik nin nir nka nkc nke nkf nki nkk nkn nkr nna nnb nnc nne nnf nni nnk nnn nra nrb nrc nre nrf nri nrk nrn nrr ra- raa rab rac rae raf rai rak ran rar rba rbb rbc rbe rbf rbi rbk rbn rbr rca rcb rcc rce rcf rci rcn rcr re- rea reb rec ree ref rei rek ren rer rfa rfb rfc rfe rff rfi rfk rfn rfr ria rib ric rie rif rii rik rin rir rkb rkc rke rkf rkk rna rnb rnc rni rnn rnr rra rrb rrc rrf rri rrk rrn rrr