-ic bbb bbc bbd bbe bbi bbo bbx bcb bcc bcd bce bci bco bcx bdb bdc bdd bde bdi bdo bdx be- beb bec bed bee bei beo bex bi- bib bic bid bie bii bio bix bob boc bod boe boi boo box bxb bxd bxi bxo bxx c-- cbb cbc cbd cbe cbi cbo cbx ccb ccc ccd cce cci cco ccx cdb cdc cdd cde cdi cdo cdx ce- ceb cec ced cee cei ceo cex ci- cib cic cid cie cii cio cix co- cob coc cod coe coi coo cox cxc cxi cxo cxx dbb dbc dbd dbe dbi dbo dbx dcb dcc dcd dce dci dco dcx ddb ddc ddd dde ddi ddo ddx de- deb dec ded dee dei deo dex di- dib dic did die dii dio dix dob doc dod doe doi doo dox dxc dxd dxi dxo dxx ebb ebc ebd ebe ebi ebo ebx ec- ecb ecc ecd ece eci eco ecx ed- edb edc edd ede edi edo edx eeb eec eed eee eeo eex eib eic eid eie eii eio eix eo- eob eoc eod eoe eoi eoo ex- exc exd exe exi exo exx i-d ibb ibc ibd ibe ibi ibo ibx icb icc icd ice ici ico idb idc idd ide idi ido idx ie- iec ied iee iei iex iib iic iid iie iii iio iix io- iob ioc iod ioe ioi ioo ixc ixe ixi o-i ob- obb obc obd obe obi obo obx oc- ocb occ ocd oci oco ocx odb odc odd ode odi odo oeb oec oed oee oei oeo oex oib oic oid oie oii oio oo- oob ooc ood ooi ooo oox ox- oxb oxc oxi oxo oxx xbc xbe xbx xcb xcd xci xcx xdb xdc xde xdi xed xee xex xic xie xii xio xix xoc xod xoi xoo xox xxi xxo xxx