bbb bbd bbi bbn bbo bdb bdd bdi bdo bi- bib bid bii bin bio bnb bnd bni bnn bno bob bod boi bon boo dbb dbd dbi dbn dbo ddb ddd ddi ddn ddo di- dib did dii din dio dnb dnd dni dnn dno dob dod doi don doo i-d ibb ibd ibi ibn ibo idb idd idi idn ido iib iid iii iin iio in- inb ind ini inn ino io- iob iod ioi ion ioo n-i nbb nbd nbi nbn nbo ndb ndd ndi ndn ndo nib nid nii nin nio nnb nni nnn nno no- nob nod noi non noo o-i ob- obb obd obi obn obo odb odd odi odn odo oib oid oii oin oio on- onb ond oni onn ono oo- oob ood ooi oon ooo