-ol c-- ccc cch ccl cco ccs ch- chc chh chl cho chs cl- clc clh cll clo cls co- coc coh col coo cos csc csh csl cso css hcc hch hcl hco hcs hhc hhh hhl hho hhs hlc hlh hll hlo hls hoc hoh hol hoo hos hsc hsh hsl hss lcc lch lcl lco lcs lhc lhh lho lhs llc lll llo lls loc loh lol loo los lsc lsh lsl lso lss oc- occ och ocl oco ocs ohc ohh ohl oho ohs olc oll olo ols oo- ooc ooh ool ooo oos os- osc osh osl oso oss scc sch scl sco scs sh- shc shh shl sho shs slc slh sll slo sls soc soh sol soo sos ss- ssc ssh ssl sso sss