-ey bbb bbd bbe bbn bby bdb bdd bde bdy bdz be- beb bed bee ben bey bez bnb bnd bne bnn bnz by- byd bye byn byz bzd bze bzn bzz dbb dbd dbe dbn dby dbz ddb ddd dde ddn ddy ddz de- deb ded dee den dey dez dnb dnd dne dnn dny dnz dy- dyb dyd dye dyn dyy dzb dzd dze ebb ebd ebe ebn eby ed- edb edd ede edn edy eeb eed eee een eey en- enb end ene enn eny enz eyd eye eyn eze ezz nbb nbd nbe nbn ndb ndd nde ndn ndy ne- neb ned nee nen ney nez nnb nne nnn nnz nyd nye nyn nyy nzb nzd nze nzz ybe yby ybz yde ydn ydy yeb yed yee yen yey yez ynd yne ynn yny yyb yye yyy yyz yzb yzy zbb zby zeb zed zee zen zez znd zne znn zzy zzz