a-a a-b a-i a-t aaa aab aad aae aag aai aat ab- aba abb abd abe abg abi abt ad- ada adb add ade adg adi adt aea aeb aed aee aeg aei aet ag- aga agb agd age agg agi agt ai- aia aib aid aie aig aii ait at- ata atb atd ate atg ati att baa bab bad bae bag bai bat bba bbb bbd bbe bbg bbi bbt bda bdb bdd bde bdg bdi bdt be- bea beb bed bee beg bei bet bga bgb bgd bge bgg bgi bgt bi- bia bib bid bie big bii bit bta btb btd bte btg bti btt daa dab dad dae dag dai dat dba dbb dbd dbe dbg dbi dbt dda ddb ddd dde ddg ddi ddt de- dea deb ded dee deg dei det dga dgd dge dgg dgi dgt di- dia dib did die dig dii dit dta dtb dtd dte dtg dti dtt eaa eab ead eae eag eai eat eba ebb ebd ebe ebg ebi ebt ed- eda edb edd ede edg edi edt eea eeb eed eee eeg eet ega egb egd ege egg egi egt eia eib eid eie eig eii eit eta etb etd ete etg eti ett g-d gaa gab gad gae gag gai gat gba gbd gbe gbg gbi gbt gda gdb gdd gde gdi gdt ge- gea geb ged gee geg gei get gga ggb ggd ggg ggi ggt gia gib gid gie gig gii git gta gtb gtd gte gtg gti gtt i-d ia- iaa iab iad iae iag iai iat iba ibb ibd ibe ibg ibi ibt ida idb idd ide idg idi idt ie- iea ied iee ieg iei iet iga igb igd ige igg igi igt iia iib iid iie iii iit ita itb itd ite itg iti itt taa tab tad tae tag tai tat tba tbb tbd tbe tbg tbi tbt tda tdb tdd tde tdg tdi tdt te- tea teb ted tee teg tei tet tga tgb tge tgg tgi tgt tia tib tid tie tig tii tit tta ttb ttd tte ttg tti ttt