a-a a-b a-i a-t aaa aab aad aag aai aat ab- aba abb abd abg abi abt ad- ada adb add adg adi adt ag- aga agb agd agg agi agt ai- aia aib aid aig aii ait at- ata atb atd atg ati att baa bab bad bag bai bat bba bbb bbd bbg bbi bbt bda bdb bdd bdg bdi bdt bga bgb bgd bgg bgi bgt bi- bia bib bid big bii bit bta btb btd btg bti btt daa dab dad dag dai dat dba dbb dbd dbg dbi dbt dda ddb ddd ddg ddi ddt dga dgd dgg dgi dgt di- dia dib did dig dii dit dta dtb dtd dtg dti dtt g-d gaa gab gad gag gai gat gba gbd gbg gbi gbt gda gdb gdd gdi gdt gga ggb ggd ggg ggi ggt gia gib gid gig gii git gta gtb gtd gtg gti gtt i-d ia- iaa iab iad iag iai iat iba ibb ibd ibg ibi ibt ida idb idd idg idi idt iga igb igd igg igi igt iia iib iid iii iit ita itb itd itg iti itt taa tab tad tag tai tat tba tbb tbd tbg tbi tbt tda tdb tdd tdg tdi tdt tga tgb tgg tgi tgt tia tib tid tig tii tit tta ttb ttd ttg tti ttt