bbb bbd bbe bbk bbn bbo bdb bdd bde bdk bdo be- beb bed bee bek ben beo bkb bke bkk bkn bko bnb bnd bne bnk bnn bno bob bod boe bok bon boo dbb dbd dbe dbk dbn dbo ddb ddd dde ddk ddn ddo de- deb ded dee dek den deo dkb dke dkk dko dnb dnd dne dnk dnn dno dob dod doe dok don doo ebb ebd ebe ebk ebn ebo ed- edb edd ede edk edn edo eeb eed eee eek een eeo ekb ekd eke eko en- enb end ene enk enn eno eo- eob eod eoe eok eon eoo kbb kbd kbe kbk kbn kbo kdb kde kdk kdo ke- keb ked kee kek ken keo kkb kke kkk kkn kn- knd kne knk knn kno kob kod koe kok kon koo nbb nbd nbe nbk nbn nbo ndb ndd nde ndk ndn ndo ne- neb ned nee nek nen neo nke nkk nkn nko nnb nne nnk nnn nno no- nob nod noe nok non noo ob- obb obd obe obk obn obo odb odd ode odn odo oeb oed oee oen oeo okb okd oke okk oko on- onb ond one onk onn ono oo- oob ood ook oon ooo