-ey bbb bbe bbi bbo bbs bby be- beb bee bei beo bes bey bi- bib bie bii bio bis biy bob boe boi boo bos boy bsb bse bsi bso bss bsy by- bye byi byo bys ebb ebe ebi ebo ebs eby eeb eee eeo ees eey eib eie eii eio eis eo- eob eoe eoi eoo eos es- esb ese esi eso ess esy eye eyo eys ibb ibe ibi ibo ibs iby ie- iee iei ies iey iib iie iii iio iis io- iob ioe ioi ioo ios is- isb ise isi iso iss isy iye iyo iys iyy o-i ob- obb obe obi obo obs oby oeb oee oei oeo oes oey oib oie oii oio ois oo- oob ooi ooo oos os- osb ose osi oso oss oye oyi oyo oys sbb sbe sbi sbo sbs sby se- seb see sei seo ses sey sib sie sii sio sis sob soe soi soo sos soy ss- ssb sse ssi sso sss sy- syb sye syi sys ybe ybi ybs yby yeb yee yei yeo yes yey yie yii yio yis yob yoe yoi yoo yos yoy ysb yse ysi yso yss ysy yyb yye yys yyy