-ol c-- ccc cck ccl cco ccs ccx ckc cko cks ckx cl- clc clk cll clo cls clx co- coc cok col coo cos cox csc csk csl cso css csx cxc cxk cxl cxo cxs cxx kcc kck kcl kcs kcx kkc kkk kkl kks kl- klc klo kls klx koc kok kol koo kos ksc ksk ksl kso kss kxl kxo lcc lck lcl lco lcs lcx lkl lks llc llk lll llo lls loc lok lol loo los lox lsc lsk lsl lso lss lxc lxo lxx oc- occ ock ocl oco ocs ocx okc okk okl oko oks olc olk oll olo ols oo- ooc ook ool ooo oos oox os- osc osk osl oso oss osx ox- oxc oxo oxx scc sck scl sco scs scx sk- skc skk skl sko sks skx slc slk sll slo sls slx soc sok sol soo sos sox ss- ssc ssk ssl sso sss ssx sxc sxl sxs xcl xcx xkl xks xls xoc xok xoo xos xox xsc xsl xss xxl xxo xxx