-ic c-- ccc cce ccf cci cco ccs ce- cec cee cef cei ceo ces cfc cfe cff cfi cfo cfs ci- cic cie cif cii cio cis co- coc coe cof coi coo cos csc cse csf csi cso css ec- ecc ece ecf eci eco ecs eec eee eef eeo ees ef- efc efe eff efi efo efs eic eie eif eii eio eis eo- eoc eoe eof eoi eoo eos es- esc ese esf esi eso ess fcc fce fcf fci fco fcs fec fee fef fei feo fes ffc ffe fff ffi ffo ffs fic fie fif fii fis foc foe fof foi foo fos fsc fse fsf fsi fso fss i-f icc ice icf ici ico ics ie- iec iee ief iei ies ifc ife iff ifi ifo ifs iic iie iif iii iio iis io- ioc ioe iof ioi ioo ios is- isc ise isf isi iso iss o-i oc- occ ocf oci oco ocs oec oee oef oei oeo oes of- ofc ofe off ofi ofo ofs oic oie oif oii oio ois oo- ooc oof ooi ooo oos os- osc ose osf osi oso oss scc sce scf sci sco scs se- sec see sef sei seo ses sfc sfe sff sfi sfo sfs sic sie sif sii sio sis soc soe sof soi soo sos ss- ssc sse ssf ssi sso sss