-ol c-- ccc ccl ccn cco ccs cl- clc cll cln clo cls cn- cnc cnl cnn cno cns co- coc col con coo cos csc csl csn cso css lcc lcl lcn lco lcs llc lll lln llo lls lnc lnl lnn lno lns loc lol lon loo los lsc lsl lsn lso lss ncc ncl ncn nco ncs nlc nll nln nlo nls nnc nnl nnn nno nns no- noc nol non noo nos nsc nsl nsn nso nss oc- occ ocl ocn oco ocs olc oll oln olo ols on- onc onl onn ono ons oo- ooc ool oon ooo oos os- osc osl osn oso oss scc scl scn sco scs slc sll sln slo sls snc snl snn sno sns soc sol son soo sos ss- ssc ssl ssn sso sss