a-a a-b a-i aaa aab aai aan aao aay ab- aba abb abi abn abo aby ai- aia aib aii ain aio aiy an- ana anb ani ann ano any aoa aob aoi aon aoo ay- aya ayi ayn ayo baa bab bai ban bao bay bba bbb bbi bbn bbo bby bi- bia bib bii bin bio biy bna bnb bni bnn bno boa bob boi bon boo boy by- bya byi byn byo ia- iaa iab iai ian iao iba ibb ibi ibn ibo iby iia iib iii iin iio in- ina inb ini inn ino iny io- ioa iob ioi ion ioo iya iyo iyy n-i naa nab nai nan nao nay nba nbb nbi nbn nbo nia nib nii nin nio nna nnb nni nnn nno no- noa nob noi non noo noy nya nyn nyo nyy o-i oaa oab oai oan oao ob- oba obb obi obn obo oby oia oib oii oin oio on- ona onb oni onn ono ony oo- ooa oob ooi oon ooo oya oyi oyo yaa yab yai yan yao yay ybi yby yii yin yio yna ynn yny yob yoi yon yoo yoy yyb yyy