-ey bbb bbd bbe bbi bbs bby bdb bdd bde bdi bds bdy be- beb bed bee bei bes bey bi- bib bid bie bii bis biy bsb bsd bse bsi bss bsy by- byd bye byi bys dbb dbd dbe dbi dbs dby ddb ddd dde ddi dds ddy de- deb ded dee dei des dey di- dib did die dii dis diy dsb dsd dse dsi dss dsy dy- dyb dyd dye dys dyy ebb ebd ebe ebi ebs eby ed- edb edd ede edi eds edy eeb eed eee ees eey eib eid eie eii eis es- esb esd ese esi ess esy eyd eye eys i-d ibb ibd ibe ibi ibs iby idb idd ide idi ids idy ie- ied iee iei ies iey iib iid iie iii iis is- isb isd ise isi iss isy iye iys iyy sbb sbd sbe sbi sbs sby sdb sdd sde sdi sds sdy se- seb sed see sei ses sey sib sid sie sii sis ss- ssb ssd sse ssi sss sy- syb syd sye syi sys ybe ybi ybs yby yde yds ydy yeb yed yee yei yes yey yid yie yii yis ysb yse ysi yss ysy yyb yye yys yyy