-ic bbb bbc bbd bbe bbi bbo bcb bcc bcd bce bci bco bdb bdc bdd bde bdi bdo be- beb bec bed bee bei beo bi- bib bic bid bie bii bio bob boc bod boe boi boo c-- cbb cbc cbd cbe cbi cbo ccb ccc ccd cce cci cco cdb cdc cdd cde cdi cdo ce- ceb cec ced cee cei ceo ci- cib cic cid cie cii cio co- cob coc cod coe coi coo dbb dbc dbd dbe dbi dbo dcb dcc dcd dce dci dco ddb ddc ddd dde ddi ddo de- deb dec ded dee dei deo di- dib dic did die dii dio dob doc dod doe doi doo ebb ebc ebd ebe ebi ebo ec- ecb ecc ecd ece eci eco ed- edb edc edd ede edi edo eeb eec eed eee eeo eib eic eid eie eii eio eo- eob eoc eod eoe eoi eoo i-d ibb ibc ibd ibe ibi ibo icb icc icd ice ici ico idb idc idd ide idi ido ie- iec ied iee iei iib iic iid iie iii iio io- iob ioc iod ioe ioi ioo o-i ob- obb obc obd obe obi obo oc- ocb occ ocd oci oco odb odc odd ode odi odo oeb oec oed oee oei oeo oib oic oid oie oii oio oo- oob ooc ood ooi ooo