bbb bbd bbe bbm bbn bdb bdd bde bdm be- beb bed bee bem ben bmb bmd bme bmm bmn bnb bnd bne bnn dbb dbd dbe dbm dbn ddb ddd dde ddm ddn de- deb ded dee dem den dmb dmd dme dmm dmn dnb dnd dne dnm dnn ebb ebd ebe ebm ebn ed- edb edd ede edm edn eeb eed eee eem een em- emb emd eme emm emn en- enb end ene enm enn mbb mbd mbe mbm mdb mdd mde mdm mdn meb med mee mem men mmb mmd mme mmm mmn mnb mne mnm mnn nbb nbd nbe nbm nbn ndb ndd nde ndm ndn ne- neb ned nee nem nen nmb nmd nme nmm nmn nnb nne nnm nnn