-ol c-- ccc ccl cco cct ccx cl- clc cll clo clt clx co- coc col coo cot cox ctc ctl cto ctt ctx cxc cxl cxo cxt cxx lcc lcl lco lct lcx llc lll llo llt loc lol loo lot lox ltc ltl lto ltt ltx lxc lxo lxx oc- occ ocl oco oct ocx olc oll olo olt oo- ooc ool ooo oot oox ot- otc otl oto ott ox- oxc oxo oxt oxx t-x tcc tcl tco tct tcx tlc tll tlo tlt tlx to- toc tol too tot tox ttc ttl tto ttt ttx txl txt xcl xcx xlt xoc xoo xot xox xtc xtx xxl xxo xxx