bbb bbd bbe bbn bbo bbt bdb bdd bde bdo bdt be- beb bed bee ben beo bet bnb bnd bne bnn bno bnt bob bod boe bon boo bot btb btd bte btn bto btt dbb dbd dbe dbn dbo dbt ddb ddd dde ddn ddo ddt de- deb ded dee den deo det dnb dnd dne dnn dno dnt dob dod doe don doo dot dtb dtd dte dtn dto dtt ebb ebd ebe ebn ebo ebt ed- edb edd ede edn edo edt eeb eed eee een eeo eet en- enb end ene enn eno ent eo- eob eod eoe eon eoo eot etb etd ete etn eto ett nbb nbd nbe nbn nbo nbt ndb ndd nde ndn ndo ndt ne- neb ned nee nen neo net nnb nne nnn nno nnt no- nob nod noe non noo not ntb ntd nte ntn nto ntt ob- obb obd obe obn obo obt odb odd ode odn odo odt oeb oed oee oen oeo oet on- onb ond one onn ono ont oo- oob ood oon ooo oot ot- otb otd ote otn oto ott tbb tbd tbe tbn tbo tbt tdb tdd tde tdn tdo tdt te- teb ted tee ten teo tet tnb tnd tne tnn tno tnt to- tob tod toe ton too tot ttb ttd tte ttn tto ttt