-ic a-a a-b a-c a-i a-t aaa aab aac aad aae aai aat ab- aba abb abc abd abe abi abt ac- aca acb acc acd ace aci act ad- ada adb adc add ade adi adt aea aeb aec aed aee aei aet ai- aia aib aic aid aie aii ait at- ata atb atc atd ate ati att baa bab bac bad bae bai bat bba bbb bbc bbd bbe bbi bbt bca bcb bcc bcd bce bci bct bda bdb bdc bdd bde bdi bdt be- bea beb bec bed bee bei bet bi- bia bib bic bid bie bii bit bta btb btc btd bte bti btt c-- caa cab cac cad cae cai cat cba cbb cbc cbd cbe cbi cbt cca ccb ccc ccd cce cci cct cda cdb cdc cdd cde cdi cdt ce- cea ceb cec ced cee cei cet ci- cia cib cic cid cie cii cit cta ctb ctc ctd cte cti ctt daa dab dac dad dae dai dat dba dbb dbc dbd dbe dbi dbt dca dcb dcc dcd dce dci dct dda ddb ddc ddd dde ddi ddt de- dea deb dec ded dee dei det di- dia dib dic did die dii dit dta dtb dtc dtd dte dti dtt eaa eab eac ead eae eai eat eba ebb ebc ebd ebe ebi ebt ec- eca ecb ecc ecd ece eci ect ed- eda edb edc edd ede edi edt eea eeb eec eed eee eet eia eib eic eid eie eii eit eta etb etc etd ete eti ett i-d ia- iaa iab iac iad iae iai iat iba ibb ibc ibd ibe ibi ibt ica icb icc icd ice ici ict ida idb idc idd ide idi idt ie- iea iec ied iee iei iet iia iib iic iid iie iii iit ita itb itc itd ite iti itt taa tab tac tad tae tai tat tba tbb tbc tbd tbe tbi tbt tca tcb tcc tcd tce tci tct tda tdb tdc tdd tde tdi tdt te- tea teb tec ted tee tei tet tia tib tic tid tie tii tit tta ttb ttc ttd tte tti ttt