bbb bbd bbe bbn bbo bdb bdd bde bdo be- beb bed bee ben beo bnb bnd bne bnn bno bob bod boe bon boo dbb dbd dbe dbn dbo ddb ddd dde ddn ddo de- deb ded dee den deo dnb dnd dne dnn dno dob dod doe don doo ebb ebd ebe ebn ebo ed- edb edd ede edn edo eeb eed eee een eeo en- enb end ene enn eno eo- eob eod eoe eon eoo nbb nbd nbe nbn nbo ndb ndd nde ndn ndo ne- neb ned nee nen neo nnb nne nnn nno no- nob nod noe non noo ob- obb obd obe obn obo odb odd ode odn odo oeb oed oee oen oeo on- onb ond one onn ono oo- oob ood oon ooo