-er bbb bbd bbe bbl bbn bbr bdb bdd bde bdl bdr be- beb bed bee bel ben ber blb bld ble bll bln blr bnb bnd bne bnl bnn bnr brb brd bre brl brn brr dbb dbd dbe dbl dbn dbr ddb ddd dde ddl ddn ddr de- deb ded dee del den der dl- dlb dld dle dll dlr dnb dnd dne dnl dnn dnr drb drd dre drl drn drr ebb ebd ebe ebl ebn ebr ed- edb edd ede edl edn edr eeb eed eee eel een eer elb eld ele ell eln elr en- enb end ene enl enn enr erb erd ere erl ern err lbb lbd lbe lbl lbr ldb ldd lde ldl ldn ldr leb led lee lel len ler llb lld lle lll lln llr lnb lnd lne lnl lnn lnr lrb lrd lrn lrr nbb nbd nbe nbl nbn nbr ndb ndd nde ndl ndn ndr ne- neb ned nee nel nen ner nlb nld nle nll nln nlr nnb nne nnl nnn nrb nrd nre nrl nrn nrr rbb rbd rbe rbl rbn rbr rdb rdd rde rdl rdn rdr re- reb red ree rel ren rer rld rle rll rln rlr rnb rnd rnn rnr rrb rrd rrl rrn rrr