a-a a-b a-i a-t aaa aab aad aag aai aat aay ab- aba abb abd abg abi abt aby ad- ada adb add adg adi adt ady ag- aga agb agd agg agi agt agy ai- aia aib aid aig aii ait aiy at- ata atb atd atg ati att ay- aya ayd ayi ayt baa bab bad bag bai bat bay bba bbb bbd bbg bbi bbt bby bda bdb bdd bdg bdi bdt bdy bga bgb bgd bgg bgi bgt bi- bia bib bid big bii bit biy bta btb btd btg bti btt bty by- bya byd byg byi byt daa dab dad dag dai dat day dba dbb dbd dbg dbi dbt dby dda ddb ddd ddg ddi ddt ddy dga dgd dgg dgi dgt di- dia dib did dig dii dit diy dta dtb dtd dtg dti dtt dty dy- dya dyb dyd dyy g-d gaa gab gad gag gai gat gay gba gbd gbg gbi gbt gby gda gdb gdd gdi gdt gga ggb ggd ggg ggi ggt gia gib gid gig gii git giy gta gtb gtd gtg gti gtt gty gy- gya gyb gyd i-d ia- iaa iab iad iag iai iat iba ibb ibd ibg ibi ibt iby ida idb idd idg idi idt idy iga igb igd igg igi igt igy iia iib iid iii iit ita itb itd itg iti itt ity iya iyt iyy taa tab tad tag tai tat tay tba tbb tbd tbg tbi tbt tda tdb tdd tdg tdi tdt tdy tga tgb tgg tgi tgt tgy tia tib tid tig tii tit tiy tta ttb ttd ttg tti ttt tty tya tyd tyg tyt yaa yab yad yag yai yat yay ybg ybi yby yda ydg ydt ydy yga yid yig yii yit yta ytd ytt yyb yyg yyt yyy