-ic c-- ccc cce ccf cci cco ccs ccx ce- cec cee cef cei ceo ces cex cfc cfe cff cfi cfo cfs cfx ci- cic cie cif cii cio cis cix co- coc coe cof coi coo cos cox csc cse csf csi cso css csx cxc cxf cxi cxo cxs cxx ec- ecc ece ecf eci eco ecs ecx eec eee eef eeo ees eex ef- efc efe eff efi efo efs efx eic eie eif eii eio eis eix eo- eoc eoe eof eoi eoo eos es- esc ese esf esi eso ess esx ex- exc exe exi exo exs exx fcc fce fcf fci fco fcs fcx fec fee fef fei feo fes fex ffc ffe fff ffi ffo ffs ffx fic fie fif fii fis fix foc foe fof foi foo fos fox fsc fse fsf fsi fso fss fsx fxe fxi fxs fxx i-f icc ice icf ici ico ics ie- iec iee ief iei ies iex ifc ife iff ifi ifo ifs ifx iic iie iif iii iio iis iix io- ioc ioe iof ioi ioo ios is- isc ise isf isi iso iss ixc ixe ixi o-i oc- occ ocf oci oco ocs ocx oec oee oef oei oeo oes oex of- ofc ofe off ofi ofo ofs ofx oic oie oif oii oio ois oo- ooc oof ooi ooo oos oox os- osc ose osf osi oso oss osx ox- oxc oxf oxi oxo oxx scc sce scf sci sco scs scx se- sec see sef sei seo ses sex sfc sfe sff sfi sfo sfs sfx sic sie sif sii sio sis six soc soe sof soi soo sos sox ss- ssc sse ssf ssi sso sss ssx sxc sxi sxs xcf xci xcx xee xes xex xfe xfs xfx xic xie xii xio xis xix xoc xof xoi xoo xos xox xsc xsi xss xxi xxo xxx