bbb bbc bbd bbe bbo bbx bcb bcc bcd bce bco bcx bdb bdc bdd bde bdo bdx be- beb bec bed bee beo bex bob boc bod boe boo box bxb bxd bxo bxx c-- cbb cbc cbd cbe cbo cbx ccb ccc ccd cce cco ccx cdb cdc cdd cde cdo cdx ce- ceb cec ced cee ceo cex co- cob coc cod coe coo cox cxc cxo cxx dbb dbc dbd dbe dbo dbx dcb dcc dcd dce dco dcx ddb ddc ddd dde ddo ddx de- deb dec ded dee deo dex dob doc dod doe doo dox dxc dxd dxo dxx ebb ebc ebd ebe ebo ebx ec- ecb ecc ecd ece eco ecx ed- edb edc edd ede edo edx eeb eec eed eee eeo eex eo- eob eoc eod eoe eoo ex- exc exd exe exo exx ob- obb obc obd obe obo obx oc- ocb occ ocd oco ocx odb odc odd ode odo oeb oec oed oee oeo oex oo- oob ooc ood ooo oox ox- oxb oxc oxo oxx xbc xbe xbx xcb xcd xcx xdb xdc xde xed xee xex xoc xod xoo xox xxo xxx