a-a a-b a-i aaa aab aag aai aak aay ab- aba abb abg abi abk aby ag- aga agb agg agi agk agy ai- aia aib aig aii aik aiy aka akb akg aki akk ay- aya ayi ayk baa bab bag bai bak bay bba bbb bbg bbi bbk bby bga bgb bgg bgi bgk bi- bia bib big bii bik biy bka bkb bkg bkk by- bya byg byi byk gaa gab gag gai gak gay gba gbg gbi gbk gby gga ggb ggg ggi gia gib gig gii gik giy gka gkb gy- gya gyb ia- iaa iab iag iai iba ibb ibg ibi ibk iby iga igb igg igi igk igy iia iib iii ika ikb iki ikk iya iyy ka- kaa kab kag kai kak kay kba kbb kbi kbk kga kgb kgi kgy kia kib kig kii kik kkb kki kkk kky kya yaa yab yag yai yak yay ybg ybi yby yga yig yii yka yki ykk yyb yyg yyy