-ey b-u bbb bbc bbd bbe bbu bby bcb bcc bcd bce bcu bcy bcz bdb bdc bdd bde bdu bdy bdz be- beb bec bed bee beu bey bez bub buc bud bue buu buy buz by- byc byd bye byu byz bzd bze bzu bzz c-- cbb cbc cbd cbe cbu cby cbz ccb ccc ccd cce ccu ccz cdb cdc cdd cde cdu cdy cdz ce- ceb cec ced cee ceu cey cez cub cuc cud cue cuu cuy cuz cyb cyc cyd cye cz- czc czd cze dbb dbc dbd dbe dbu dby dbz dcb dcc dcd dce dcu ddb ddc ddd dde ddu ddy ddz de- deb dec ded dee deu dey dez dub duc dud due duy duz dy- dyb dyc dyd dye dyu dyy dzb dzd dze dzu ebb ebc ebd ebe ebu eby ec- ecb ecc ecd ece ecu ed- edb edc edd ede edu edy eeb eec eed eee eey eu- eub euc eud eue eyc eyd eye eze ezz ubb ubc ube ubu uby ucb ucc ucd uce ucu udb udc udd ude udu ueb uec ued uee uey uuc uue uuu uyc uyu uzb uzu ybc ybe yby ybz ycc ycd yce ycu ycy yde ydy yeb yec yed yee yey yez yud yue yuu yuy yyb yyc yye yyu yyy yyz yzb yzu yzy zbb zbc zby zce zeb zec zed zee zez zub zuc zud zuz zzy zzz