a-a a-b a-i a-t aaa aab aai aak aat aay ab- aba abb abi abk abt aby ai- aia aib aii aik ait aiy aka akb aki akk at- ata atb ati att ay- aya ayi ayk ayt baa bab bai bak bat bay bba bbb bbi bbk bbt bby bi- bia bib bii bik bit biy bka bkb bkk bkt bta btb bti btk btt bty by- bya byi byk byt ia- iaa iab iai iat iba ibb ibi ibk ibt iby iia iib iii iit ika ikb iki ikk ikt ita itb iti itk itt ity iya iyt iyy k-t ka- kaa kab kai kak kat kay kba kbb kbi kbk kia kib kii kik kit kkb kki kkk kkt kky kta ktb ktk ktt kya kyt taa tab tai tak tat tay tba tbb tbi tbk tbt tia tib tii tik tit tiy tka tkb tkk tkt tky tta ttb tti ttk ttt tty tya tyt yaa yab yai yak yat yay ybi yby yii yit yka yki ykk yta ytk ytt yyb yyt yyy