-ic c-- ccc ccd cce ccf cci ccp ccs cdc cdd cde cdf cdi cdp cds ce- cec ced cee cef cei cep ces cfc cfd cfe cff cfi cfp cfs ci- cic cid cie cif cii cip cis cpc cpd cpe cpf cpi cpp cps csc csd cse csf csi csp css dcc dcd dce dcf dci dcp dcs ddc ddd dde ddf ddi ddp dds de- dec ded dee def dei dep des dfc dfd dfe dff dfi dfp dfs di- dic did die dif dii dip dis dpc dpd dpe dpf dpi dpp dps dsc dsd dse dsf dsi dsp dss ec- ecc ecd ece ecf eci ecs ed- edc edd ede edf edi edp eds eec eed eee eef eep ees ef- efc efd efe eff efi efp efs eic eid eie eif eii eip eis ep- epc epd epe epf epi epp eps es- esc esd ese esf esi esp ess fcc fcd fce fcf fci fcp fcs fdc fdd fde fdf fdi fdp fds fec fed fee fef fei fep fes ffc ffd ffe fff ffi ffp ffs fic fid fie fif fii fip fis fpc fpd fpe fpi fpp fps fsc fsd fse fsf fsi fsp fss i-d i-f icc icd ice icf ici icp ics idc idd ide idf idi idp ids ie- iec ied iee ief iei iep ies ifc ifd ife iff ifi ifp ifs iic iid iie iif iii iip iis ipc ipd ipe ipf ipi ipp ips is- isc isd ise isf isi isp iss p-p pcc pcd pce pcf pci pcp pcs pdc pdd pde pdf pdi pdp pds pec ped pee pef pei pep pes pfc pfd pfe pff pfi pfp pfs pic pid pie pif pii pip pis ppc ppd ppe ppf ppi ppp pps ps- psc psd pse psf psi psp pss scc scd sce scf sci scp scs sdc sdd sde sdf sdi sdp sds se- sec sed see sef sei sep ses sfc sfd sfe sff sfi sfp sfs sic sid sie sif sii sip sis spc spd spe spf spi spp sps ss- ssc ssd sse ssf ssi ssp sss