-ic bbb bbc bbd bbi bbn bbo bbr bcb bcc bcd bci bcn bco bcr bdb bdc bdd bdi bdo bdr bi- bib bic bid bii bin bio bir bnb bnc bnd bni bnn bno bnr bob boc bod boi bon boo bor brb brd bri brn bro brr c-- cbb cbc cbd cbi cbn cbo cbr ccb ccc ccd cci ccn cco ccr cdb cdc cdd cdi cdn cdo cdr ci- cib cic cid cii cin cio cir cn- cnb cnc cnd cni cnn cno cnr co- cob coc cod coi con coo cor crb crc crd cri crn cro crr dbb dbc dbd dbi dbn dbo dbr dcb dcc dcd dci dcn dco dcr ddb ddc ddd ddi ddn ddo ddr di- dib dic did dii din dio dir dnb dnc dnd dni dnn dno dnr dob doc dod doi don doo dor drb drc drd dri drn dro drr i-d ibb ibc ibd ibi ibn ibo ibr icb icc icd ici icn ico icr idb idc idd idi idn ido idr iib iic iid iii iin iio iir in- inb inc ind ini inn ino inr io- iob ioc iod ioi ion ioo ior ir- irb irc ird iri irn iro irr n-i nbb nbc nbd nbi nbn nbo nbr ncb ncc ncd nci ncn nco ncr ndb ndc ndd ndi ndn ndo ndr nib nic nid nii nin nio nir nnb nnc nni nnn nno no- nob noc nod noi non noo nor nrb nrc nrd nri nrn nro nrr o-i ob- obb obc obd obi obn obo obr oc- ocb occ ocd oci ocn oco ocr odb odc odd odi odn odo odr oib oic oid oii oin oio oir on- onb onc ond oni onn ono onr oo- oob ooc ood ooi oon ooo oor or- orb orc ord ori orn oro orr rbb rbc rbd rbi rbn rbo rbr rcb rcc rcd rci rcn rco rcr rdb rdc rdd rdi rdn rdo rdr rib ric rid rii rin rio rir rnb rnc rnd rni rnn rno rnr rob roc rod roi ron roo ror rrb rrc rrd rri rrn rrr