-ey bbb bbe bbi bbo bbt bby be- beb bee bei beo bet bey bi- bib bie bii bio bit biy bob boe boi boo bot boy btb bte bti bto btt bty by- bye byi byo byt ebb ebe ebi ebo ebt eby eeb eee eeo eet eey eib eie eii eio eit eo- eob eoe eoi eoo eot etb ete eti eto ett ety eye eyo eyt ibb ibe ibi ibo ibt iby ie- iee iei iet iey iib iie iii iio iit io- iob ioe ioi ioo iot itb ite iti ito itt ity iye iyo iyt iyy o-i ob- obb obe obi obo obt oby oeb oee oei oeo oet oey oib oie oii oio oit oo- oob ooi ooo oot ot- otb ote oti oto ott oye oyi oyo tbb tbe tbi tbo tbt te- teb tee tei teo tet tey tib tie tii tio tit tiy to- tob toe toi too tot toy ttb tte tti tto ttt tty tye tyo tyt ybe ybi yby yeb yee yei yeo yet yey yie yii yio yit yob yoe yoi yoo yot yoy yte yto ytt yyb yye yyt yyy