-ic c-- ccc cce cci cco ccs ccx ce- cec cee cei ceo ces cex ci- cic cie cii cio cis cix co- coc coe coi coo cos cox csc cse csi cso css csx cxc cxi cxo cxs cxx ec- ecc ece eci eco ecs ecx eec eee eeo ees eex eic eie eii eio eis eix eo- eoc eoe eoi eoo eos es- esc ese esi eso ess esx ex- exc exe exi exo exs exx icc ice ici ico ics ie- iec iee iei ies iex iic iie iii iio iis iix io- ioc ioe ioi ioo ios is- isc ise isi iso iss ixc ixe ixi o-i oc- occ oci oco ocs ocx oec oee oei oeo oes oex oic oie oii oio ois oo- ooc ooi ooo oos oox os- osc ose osi oso oss osx ox- oxc oxi oxo oxx scc sce sci sco scs scx se- sec see sei seo ses sex sic sie sii sio sis six soc soe soi soo sos sox ss- ssc sse ssi sso sss ssx sxc sxi sxs xci xcx xee xes xex xic xie xii xio xis xix xoc xoi xoo xos xox xsc xsi xss xxi xxo xxx