-ic a-a a-b a-c a-i a-t aaa aab aac aad aae aai aan aat ab- aba abb abc abd abe abi abn abt ac- aca acb acc acd ace aci acn act ad- ada adb adc add ade adi adn adt aea aeb aec aed aee aei aen aet ai- aia aib aic aid aie aii ain ait an- ana anb anc and ane ani ann ant at- ata atb atc atd ate ati atn att baa bab bac bad bae bai ban bat bba bbb bbc bbd bbe bbi bbn bbt bca bcb bcc bcd bce bci bcn bct bda bdb bdc bdd bde bdi bdt be- bea beb bec bed bee bei ben bet bi- bia bib bic bid bie bii bin bit bna bnb bnc bnd bne bni bnn bnt bta btb btc btd bte bti btn btt c-- caa cab cac cad cae cai can cat cba cbb cbc cbd cbe cbi cbn cbt cca ccb ccc ccd cce cci ccn cct cda cdb cdc cdd cde cdi cdn cdt ce- cea ceb cec ced cee cei cen cet ci- cia cib cic cid cie cii cin cit cn- cna cnb cnc cnd cne cni cnn cnt cta ctb ctc ctd cte cti ctn ctt daa dab dac dad dae dai dan dat dba dbb dbc dbd dbe dbi dbn dbt dca dcb dcc dcd dce dci dcn dct dda ddb ddc ddd dde ddi ddn ddt de- dea deb dec ded dee dei den det di- dia dib dic did die dii din dit dna dnb dnc dnd dne dni dnn dnt dta dtb dtc dtd dte dti dtn dtt eaa eab eac ead eae eai ean eat eba ebb ebc ebd ebe ebi ebn ebt ec- eca ecb ecc ecd ece eci ecn ect ed- eda edb edc edd ede edi edn edt eea eeb eec eed eee een eet eia eib eic eid eie eii ein eit en- ena enb enc end ene eni enn ent eta etb etc etd ete eti etn ett i-d ia- iaa iab iac iad iae iai ian iat iba ibb ibc ibd ibe ibi ibn ibt ica icb icc icd ice ici icn ict ida idb idc idd ide idi idn idt ie- iea iec ied iee iei ien iet iia iib iic iid iie iii iin iit in- ina inb inc ind ine ini inn int ita itb itc itd ite iti itn itt n-i naa nab nac nad nae nai nan nat nba nbb nbc nbd nbe nbi nbn nbt nca ncb ncc ncd nce nci ncn nct nda ndb ndc ndd nde ndi ndn ndt ne- nea neb nec ned nee nei nen net nia nib nic nid nie nii nin nit nna nnb nnc nne nni nnn nnt nta ntb ntc ntd nte nti ntn ntt taa tab tac tad tae tai tan tat tba tbb tbc tbd tbe tbi tbn tbt tca tcb tcc tcd tce tci tcn tct tda tdb tdc tdd tde tdi tdn tdt te- tea teb tec ted tee tei ten tet tia tib tic tid tie tii tin tit tna tnb tnc tnd tne tni tnn tnt tta ttb ttc ttd tte tti ttn ttt