-ol c-- ccc ccd cce ccl cco ccx cdc cdd cde cdl cdo cdx ce- cec ced cee cel ceo cex cl- clc cld cle cll clo clx co- coc cod coe col coo cox cxc cxl cxo cxx dcc dcd dce dcl dco dcx ddc ddd dde ddl ddo ddx de- dec ded dee del deo dex dl- dlc dld dle dll dlo dlx doc dod doe dol doo dox dxc dxd dxl dxo dxx ec- ecc ecd ece ecl eco ecx ed- edc edd ede edl edo edx eec eed eee eel eeo eex elc eld ele ell elo elx eo- eoc eod eoe eol eoo ex- exc exd exe exl exo exx lcc lcd lce lcl lco lcx ldc ldd lde ldl ldo lec led lee lel leo lex llc lld lle lll llo loc lod loe lol loo lox lxc lxd lxo lxx oc- occ ocd ocl oco ocx odc odd ode odl odo oec oed oee oel oeo oex olc old ole oll olo oo- ooc ood ool ooo oox ox- oxc oxo oxx xcd xcl xcx xdc xde xed xee xel xex xld xoc xod xoo xox xxl xxo xxx