bbb bbe bbk bbl bbm be- beb bee bek bel bem bkb bke bkk bkl bkm blb ble blk bll blm bmb bme bmk bml bmm ebb ebe ebk ebl ebm eeb eee eek eel eem ekb eke ekl elb ele elk ell elm em- emb eme emk eml emm kbb kbe kbk kbl kbm ke- keb kee kek kel kem kkb kke kkk kkl kkm kl- klb klm kmb kme kmk kml kmm lbb lbe lbk lbl lbm leb lee lek lel lem lkb lkl llb lle llk lll llm lmb lme lmk lml lmm mbb mbe mbk mbl mbm meb mee mek mel mem mkb mke mkk mkl mkm mlb mle mlk mll mlm mmb mme mmk mml mmm