-ic bbb bbc bbd bbe bbi bbn bbo bcb bcc bcd bce bci bcn bco bdb bdc bdd bde bdi bdo be- beb bec bed bee bei ben beo bi- bib bic bid bie bii bin bio bnb bnc bnd bne bni bnn bno bob boc bod boe boi bon boo c-- cbb cbc cbd cbe cbi cbn cbo ccb ccc ccd cce cci ccn cco cdb cdc cdd cde cdi cdn cdo ce- ceb cec ced cee cei cen ceo ci- cib cic cid cie cii cin cio cn- cnb cnc cnd cne cni cnn cno co- cob coc cod coe coi con coo dbb dbc dbd dbe dbi dbn dbo dcb dcc dcd dce dci dcn dco ddb ddc ddd dde ddi ddn ddo de- deb dec ded dee dei den deo di- dib dic did die dii din dio dnb dnc dnd dne dni dnn dno dob doc dod doe doi don doo ebb ebc ebd ebe ebi ebn ebo ec- ecb ecc ecd ece eci ecn eco ed- edb edc edd ede edi edn edo eeb eec eed eee een eeo eib eic eid eie eii ein eio en- enb enc end ene eni enn eno eo- eob eoc eod eoe eoi eon eoo i-d ibb ibc ibd ibe ibi ibn ibo icb icc icd ice ici icn ico idb idc idd ide idi idn ido ie- iec ied iee iei ien iib iic iid iie iii iin iio in- inb inc ind ine ini inn ino io- iob ioc iod ioe ioi ion ioo n-i nbb nbc nbd nbe nbi nbn nbo ncb ncc ncd nce nci ncn nco ndb ndc ndd nde ndi ndn ndo ne- neb nec ned nee nei nen neo nib nic nid nie nii nin nio nnb nnc nne nni nnn nno no- nob noc nod noe noi non noo o-i ob- obb obc obd obe obi obn obo oc- ocb occ ocd oci ocn oco odb odc odd ode odi odn odo oeb oec oed oee oei oen oeo oib oic oid oie oii oin oio on- onb onc ond one oni onn ono oo- oob ooc ood ooi oon ooo