bbb bbd bbe bbn bbo bdb bdd bde bdo bdz be- beb bed bee ben beo bez bnb bnd bne bnn bno bnz bob bod boe bon boo boz bzd bze bzn bzo bzz dbb dbd dbe dbn dbo dbz ddb ddd dde ddn ddo ddz de- deb ded dee den deo dez dnb dnd dne dnn dno dnz dob dod doe don doo doz dzb dzd dze dzo ebb ebd ebe ebn ebo ed- edb edd ede edn edo eeb eed eee een eeo en- enb end ene enn eno enz eo- eob eod eoe eon eoo eze ezo ezz nbb nbd nbe nbn nbo ndb ndd nde ndn ndo ne- neb ned nee nen neo nez nnb nne nnn nno nnz no- nob nod noe non noo noz nzb nzd nze nzo nzz 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 oze ozo ozz zbb zeb zed zee zen zeo zez znd zne znn zno zo- zob zod zoe zon zoo zzz