-ic c-- ccc cce ccf cci cco ccp ccs ce- cec cee cef cei ceo cep ces cfc cfe cff cfi cfo cfp cfs ci- cic cie cif cii cio cip cis co- coc coe cof coi coo cop cos cpc cpe cpf cpi cpo cpp cps csc cse csf csi cso csp css ec- ecc ece ecf eci eco ecs eec eee eef eeo eep ees ef- efc efe eff efi efo efp efs eic eie eif eii eio eip eis eo- eoc eoe eof eoi eoo eop eos ep- epc epe epf epi epo epp eps es- esc ese esf esi eso esp ess fcc fce fcf fci fco fcp fcs fec fee fef fei feo fep fes ffc ffe fff ffi ffo ffp ffs fic fie fif fii fip fis foc foe fof foi foo fop fos fpc fpe fpi fpo fpp fps fsc fse fsf fsi fso fsp fss i-f icc ice icf ici ico icp ics ie- iec iee ief iei iep ies ifc ife iff ifi ifo ifp ifs iic iie iif iii iio iip iis io- ioc ioe iof ioi ioo iop ios ipc ipe ipf ipi ipo ipp ips is- isc ise isf isi iso isp iss o-i oc- occ ocf oci oco ocp ocs oec oee oef oei oeo oep oes of- ofc ofe off ofi ofo ofp ofs oic oie oif oii oio oip ois oo- ooc oof ooi ooo oop oos op- opc ope opf opi opo opp ops os- osc ose osf osi oso osp oss p-p pcc pce pcf pci pco pcp pcs pec pee pef pei peo pep pes pfc pfe pff pfi pfo pfp pfs pic pie pif pii pio pip pis poc poe pof poi poo pop pos ppc ppe ppf ppi ppo ppp pps ps- psc pse psf psi pso psp pss scc sce scf sci sco scp scs se- sec see sef sei seo sep ses sfc sfe sff sfi sfo sfp sfs sic sie sif sii sio sip sis soc soe sof soi soo sop sos spc spe spf spi spo spp sps ss- ssc sse ssf ssi sso ssp sss