-ey bbb bbe bbn bbs bby be- beb bee ben bes bey bez bnb bne bnn bns bnz bsb bse bsn bss bsy by- bye byn bys byz bze bzn bzs bzz ebb ebe ebn ebs eby eeb eee een ees eey en- enb ene enn ens eny enz es- esb ese esn ess esy eye eyn eys eze ezs ezz nbb nbe nbn nbs ne- neb nee nen nes ney nez nnb nne nnn nns nnz nsb nse nsn nss nsy nsz nye nyn nys nyy nzb nze nzs nzz sbb sbe sbn sbs sby se- seb see sen ses sey sez snb sne snn sns sny ss- ssb sse ssn sss ssz sy- syb sye syn sys sze ybe ybs yby ybz yeb yee yen yes yey yez yne ynn yns yny ysb yse yss ysy ysz yyb yye yys yyy yyz yzb yzy zbb zbs zby zeb zee zen zes zez zne znn zns zse zsz zzs zzy zzz