-ol c-- ccc cch cck ccl cco ccs ch- chc chh chk chl cho chs ckc ckh cko cks cl- clc clh clk cll clo cls co- coc coh cok col coo cos csc csh csk csl cso css hcc hch hck hcl hco hcs hhc hhh hhk hhl hho hhs hkh hkk hkl hko hks hlc hlh hll hlo hls hoc hoh hok hol hoo hos hsc hsh hsk hsl hss kcc kch kck kcl kcs khh khk kho khs kkc kkh kkk kkl kks kl- klc klh klo kls koc koh kok kol koo kos ksc ksh ksk ksl kso kss lcc lch lck lcl lco lcs lhc lhh lhk lho lhs lkh lkl lks llc llk lll llo lls loc loh lok lol loo los lsc lsh lsk lsl lso lss oc- occ och ock ocl oco ocs ohc ohh ohl oho ohs okc okk okl oko oks olc olk oll olo ols oo- ooc ooh ook ool ooo oos os- osc osh osk osl oso oss scc sch sck scl sco scs sh- shc shh shk shl sho shs sk- skc skh skk skl sko sks slc slh slk sll slo sls soc soh sok sol soo sos ss- ssc ssh ssk ssl sso sss