-ic a-a a-b a-c a-i a-t aaa aab aac aad aae aag aai aat ab- aba abb abc abd abe abg abi abt ac- aca acb acc acd ace acg aci act ad- ada adb adc add ade adg adi adt aea aeb aec aed aee aeg aei aet ag- aga agb agc agd age agg agi agt ai- aia aib aic aid aie aig aii ait at- ata atb atc atd ate atg ati att baa bab bac bad bae bag bai bat bba bbb bbc bbd bbe bbg bbi bbt bca bcb bcc bcd bce bcg bci bct bda bdb bdc bdd bde bdg bdi bdt be- bea beb bec bed bee beg bei bet bga bgb bgc bgd bge bgg bgi bgt bi- bia bib bic bid bie big bii bit bta btb btc btd bte btg bti btt c-- caa cab cac cad cae cag cai cat cba cbb cbc cbd cbe cbg cbi cbt cca ccb ccc ccd cce ccg cci cct cda cdb cdc cdd cde cdg cdi cdt ce- cea ceb cec ced cee ceg cei cet cga cgb cgc cgd cge cgg cgi cgt ci- cia cib cic cid cie cig cii cit cta ctb ctc ctd cte ctg cti ctt daa dab dac dad dae dag dai dat dba dbb dbc dbd dbe dbg dbi dbt dca dcb dcc dcd dce dcg dci dct dda ddb ddc ddd dde ddg ddi ddt de- dea deb dec ded dee deg dei det dga dgc dgd dge dgg dgi dgt di- dia dib dic did die dig dii dit dta dtb dtc dtd dte dtg dti dtt eaa eab eac ead eae eag eai eat eba ebb ebc ebd ebe ebg ebi ebt ec- eca ecb ecc ecd ece ecg eci ect ed- eda edb edc edd ede edg edi edt eea eeb eec eed eee eeg eet ega egb egc egd ege egg egi egt eia eib eic eid eie eig eii eit eta etb etc etd ete etg eti ett g-d gaa gab gac gad gae gag gai gat gba gbc gbd gbe gbg gbi gbt gca gcb gcc gcd gce gcg gci gct gda gdb gdc gdd gde gdi gdt ge- gea geb gec ged gee geg gei get gga ggb ggc ggd ggg ggi ggt gia gib gic gid gie gig gii git gta gtb gtc gtd gte gtg gti gtt i-d ia- iaa iab iac iad iae iag iai iat iba ibb ibc ibd ibe ibg ibi ibt ica icb icc icd ice icg ici ict ida idb idc idd ide idg idi idt ie- iea iec ied iee ieg iei iet iga igb igc igd ige igg igi igt iia iib iic iid iie iii iit ita itb itc itd ite itg iti itt taa tab tac tad tae tag tai tat tba tbb tbc tbd tbe tbg tbi tbt tca tcb tcc tcd tce tcg tci tct tda tdb tdc tdd tde tdg tdi tdt te- tea teb tec ted tee teg tei tet tga tgb tgc tge tgg tgi tgt tia tib tic tid tie tig tii tit tta ttb ttc ttd tte ttg tti ttt