-ic a-a a-b a-c a-i a-t aaa aab aac aae aaf aai aan aat ab- aba abb abc abe abf abi abn abt ac- aca acb acc ace acf aci acn act aea aeb aec aee aef aei aen aet af- afa afb afc afe aff afi afn aft ai- aia aib aic aie aif aii ain ait an- ana anb anc ane anf ani ann ant at- ata atb atc ate atf ati atn att baa bab bac bae baf bai ban bat bba bbb bbc bbe bbf bbi bbn bbt bca bcb bcc bce bcf bci bcn bct be- bea beb bec bee bef bei ben bet bfa bfb bfc bfe bff bfi bfn bft bi- bia bib bic bie bif bii bin bit bna bnb bnc bne bnf bni bnn bnt bta btb btc bte btf bti btn btt c-- caa cab cac cae caf cai can cat cba cbb cbc cbe cbf cbi cbn cbt cca ccb ccc cce ccf cci ccn cct ce- cea ceb cec cee cef cei cen cet cfa cfb cfc cfe cff cfi cfn cft ci- cia cib cic cie cif cii cin cit cn- cna cnb cnc cne cnf cni cnn cnt cta ctb ctc cte ctf cti ctn ctt eaa eab eac eae eaf eai ean eat eba ebb ebc ebe ebf ebi ebn ebt ec- eca ecb ecc ece ecf eci ecn ect eea eeb eec eee eef een eet ef- efa efb efc efe eff efi eft eia eib eic eie eif eii ein eit en- ena enb enc ene enf eni enn ent eta etb etc ete etf eti etn ett faa fab fac fae faf fai fan fat fba fbb fbc fbe fbf fbi fbn fbt fca fcb fcc fce fcf fci fcn fct fea feb fec fee fef fei fen fet ffa ffc ffe fff ffi ffn fft fia fib fic fie fif fii fin fit fna fnb fnc fne fnf fni fnn fnt fta ftb ftc fte ftf fti ftn ftt i-f ia- iaa iab iac iae iaf iai ian iat iba ibb ibc ibe ibf ibi ibn ibt ica icb icc ice icf ici icn ict ie- iea iec iee ief iei ien iet ifa ifb ifc ife iff ifi ifn ift iia iib iic iie iif iii iin iit in- ina inb inc ine inf ini inn int ita itb itc ite itf iti itn itt n-i naa nab nac nae naf nai nan nat nba nbb nbc nbe nbf nbi nbn nbt nca ncb ncc nce ncf nci ncn nct ne- nea neb nec nee nef nei nen net nfa nfb nfc nfe nff nfi nfn nft nia nib nic nie nif nii nin nit nna nnb nnc nne nnf nni nnn nnt nta ntb ntc nte ntf nti ntn ntt taa tab tac tae taf tai tan tat tba tbb tbc tbe tbf tbi tbn tbt tca tcb tcc tce tcf tci tcn tct te- tea teb tec tee tef tei ten tet tfa tfb tfc tfe tff tfi tfn tft tia tib tic tie tif tii tin tit tna tnb tnc tne tnf tni tnn tnt tta ttb ttc tte ttf tti ttn ttt