bbb bbd bbe bbl bbn bdb bdd bde bdl be- beb bed bee bel ben blb bld ble bll bln bnb bnd bne bnl bnn dbb dbd dbe dbl dbn ddb ddd dde ddl ddn de- deb ded dee del den dl- dlb dld dle dll dnb dnd dne dnl dnn ebb ebd ebe ebl ebn ed- edb edd ede edl edn eeb eed eee eel een elb eld ele ell eln en- enb end ene enl enn lbb lbd lbe lbl ldb ldd lde ldl ldn leb led lee lel len llb lld lle lll lln lnb lnd lne lnl lnn nbb nbd nbe nbl nbn ndb ndd nde ndl ndn ne- neb ned nee nel nen nlb nld nle nll nln nnb nne nnl nnn