-er bbb bbd bbe bbn bbo bbr bbx bdb bdd bde bdo bdr bdx be- beb bed bee ben beo ber bex bnb bnd bne bnn bno bnr bnx bob bod boe bon boo bor box brb brd bre brn bro brr brx bxb bxd bxn bxo bxx dbb dbd dbe dbn dbo dbr dbx ddb ddd dde ddn ddo ddr ddx de- deb ded dee den deo der dex dnb dnd dne dnn dno dnr dob dod doe don doo dor dox drb drd dre drn dro drr drx dxd dxn dxo dxr dxx ebb ebd ebe ebn ebo ebr ebx ed- edb edd ede edn edo edr edx eeb eed eee een eeo eer eex en- enb end ene enn eno enr eo- eob eod eoe eon eoo eor erb erd ere ern ero err ex- exd exe exo exr exx nbb nbd nbe nbn nbo nbr nbx ndb ndd nde ndn ndo ndr ne- neb ned nee nen neo ner nex nnb nne nnn nno no- nob nod noe non noo nor nox nrb nrd nre nrn nro nrr nrx nxd ob- obb obd obe obn obo obr obx odb odd ode odn odo odr oeb oed oee oen oeo oer oex on- onb ond one onn ono onr onx oo- oob ood oon ooo oor oox or- orb ord ore orn oro orr orx ox- oxb oxn oxo oxx rbb rbd rbe rbn rbo rbr rbx rdb rdd rde rdn rdo rdr rdx re- reb red ree ren reo rer rex rnb rnd rnn rno rnr rob rod roe ron roo ror rox rrb rrd rrn rrr rxr xbe xbr xbx xdb xde xdr xed xee xen xer xex xno xod xon xoo xor xox xrd xrx xxo xxx