bbb bbe bbm bbn bbt be- beb bee bem ben bet bmb bme bmm bmn bmt bnb bne bnn bnt btb bte btm btn btt ebb ebe ebm ebn ebt eeb eee eem een eet em- emb eme emm emn emt en- enb ene enm enn ent etb ete etm etn ett mbb mbe mbm mbt meb mee mem men met mmb mme mmm mmn mmt mnb mne mnm mnn mnt mtb mte mtm mtn mtt nbb nbe nbm nbn nbt ne- neb nee nem nen net nmb nme nmm nmn nmt nnb nne nnm nnn nnt ntb nte ntm ntn ntt tbb tbe tbm tbn tbt te- teb tee tem ten tet tmb tme tmm tmn tmt tnb tne tnm tnn tnt ttb tte ttm ttn ttt