c-- ccc ccl ccm ccs ccx cl- clc cll clm cls clx cmc cml cmm cms cmx csc csl csm css csx cxc cxl cxs cxx lcc lcl lcm lcs lcx llc lll llm lls lmc lml lmm lms lsc lsl lsm lss lxc lxx mc- mcc mcl mcm mcs mcx mlc mll mlm mls mlx mmc mml mmm mms mmx msc msl msm mss msx mxc mxl mxs scc scl scm scs scx slc sll slm sls slx smc sml smm sms smx ss- ssc ssl ssm sss ssx sxc sxl sxm sxs xcl xcx xlm xls xmc xml xmm xms xmx xsc xsl xsm xss xxl xxx