a-a a-b a-i a-t aaa aab aad aai aat aay ab- aba abb abd abi abt aby ad- ada adb add adi adt ady ai- aia aib aid aii ait aiy at- ata atb atd ati att ay- aya ayd ayi ayt baa bab bad bai bat bay bba bbb bbd bbi bbt bby bda bdb bdd bdi bdt bdy bi- bia bib bid bii bit biy bta btb btd bti btt bty by- bya byd byi byt daa dab dad dai dat day dba dbb dbd dbi dbt dby dda ddb ddd ddi ddt ddy di- dia dib did dii dit diy dta dtb dtd dti dtt dty dy- dya dyb dyd dyy i-d ia- iaa iab iad iai iat iba ibb ibd ibi ibt iby ida idb idd idi idt idy iia iib iid iii iit ita itb itd iti itt ity iya iyt iyy taa tab tad tai tat tay tba tbb tbd tbi tbt tda tdb tdd tdi tdt tdy tia tib tid tii tit tiy tta ttb ttd tti ttt tty tya tyd tyt yaa yab yad yai yat yay ybi yby yda ydt ydy yid yii yit yta ytd ytt yyb yyt yyy