-ic c-- ccc cce cci ccs ccx ce- cec cee cei ces cex ci- cic cie cii cis cix csc cse csi css csx cxc cxi cxs cxx ec- ecc ece eci ecs ecx eec eee ees eex eic eie eii eis eix es- esc ese esi ess esx ex- exc exe exi exs exx icc ice ici ics ie- iec iee iei ies iex iic iie iii iis iix is- isc ise isi iss ixc ixe ixi scc sce sci scs scx se- sec see sei ses sex sic sie sii sis six ss- ssc sse ssi sss ssx sxc sxi sxs xci xcx xee xes xex xic xie xii xis xix xsc xsi xss xxi xxx