bbb bbi bbn bbo bbt bby bi- bib bii bin bio bit biy bnb bni bnn bno bnt bob boi bon boo bot boy btb bti btn bto btt bty by- byi byn byo byt ibb ibi ibn ibo ibt iby iib iii iin iio iit in- inb ini inn ino int iny io- iob ioi ion ioo iot itb iti itn ito itt ity iyo iyt iyy n-i nbb nbi nbn nbo nbt nib nii nin nio nit nnb nni nnn nno nnt no- nob noi non noo not noy ntb nti ntn nto ntt nyn nyo nyt nyy o-i ob- obb obi obn obo obt oby oib oii oin oio oit on- onb oni onn ono ont ony oo- oob ooi oon ooo oot ot- otb oti otn oto ott oyi oyo tbb tbi tbn tbo tbt tib tii tin tio tit tiy tnb tni tnn tno tnt to- tob toi ton too tot toy ttb tti ttn tto ttt tty tyn tyo tyt ybi yby yii yin yio yit ynn yny yob yoi yon yoo yot yoy ytn yto ytt yyb yyt yyy