bbb bbe bbl bbm bbn bbt be- beb bee bel bem ben bet blb ble bll blm bln blt bmb bme bml bmm bmn bmt bnb bne bnl bnn bnt btb bte btl btm btn btt ebb ebe ebl ebm ebn ebt eeb eee eel eem een eet elb ele ell elm eln elt em- emb eme eml emm emn emt en- enb ene enl enm enn ent etb ete etl etm etn ett lbb lbe lbl lbm lbt leb lee lel lem len let llb lle lll llm lln llt lmb lme lml lmm lmn lmt lnb lne lnl lnm lnn lnt ltb lte ltl ltm ltt mbb mbe mbl mbm mbt meb mee mel mem men met mlb mle mll mlm mln mlt mmb mme mml mmm mmn mmt mnb mne mnl mnm mnn mnt mtb mte mtl mtm mtn mtt nbb nbe nbl nbm nbn nbt ne- neb nee nel nem nen net nlb nle nll nlm nln nlt nmb nme nml nmm nmn nmt nnb nne nnl nnm nnn nnt ntb nte ntm ntn ntt tbb tbe tbl tbm tbn tbt te- teb tee tel tem ten tet tle tll tlm tln tlt tmb tme tml tmm tmn tmt tnb tne tnl tnm tnn tnt ttb tte ttl ttm ttn ttt