-ic c-- ccc ccd cce ccf cci ccs cct cdc cdd cde cdf cdi cds cdt ce- cec ced cee cef cei ces cet cfc cfd cfe cff cfi cfs cft ci- cic cid cie cif cii cis cit csc csd cse csf csi css cst ctc ctd cte ctf cti cts ctt dcc dcd dce dcf dci dcs dct ddc ddd dde ddf ddi dds ddt de- dec ded dee def dei des det dfc dfd dfe dff dfi dfs dft di- dic did die dif dii dis dit dsc dsd dse dsf dsi dss dst dtc dtd dte dtf dti dts dtt ec- ecc ecd ece ecf eci ecs ect ed- edc edd ede edf edi eds edt eec eed eee eef ees eet ef- efc efd efe eff efi efs eft eic eid eie eif eii eis eit es- esc esd ese esf esi ess est etc etd ete etf eti ets ett fcc fcd fce fcf fci fcs fct fdc fdd fde fdf fdi fds fdt fec fed fee fef fei fes fet ffc ffd ffe fff ffi ffs fft fic fid fie fif fii fis fit fsc fsd fse fsf fsi fss fst ftc ftd fte ftf fti fts ftt i-d i-f icc icd ice icf ici ics ict idc idd ide idf idi ids idt ie- iec ied iee ief iei ies iet ifc ifd ife iff ifi ifs ift iic iid iie iif iii iis iit is- isc isd ise isf isi iss ist itc itd ite itf iti its itt scc scd sce scf sci scs sct sdc sdd sde sdf sdi sds sdt se- sec sed see sef sei ses set sfc sfd sfe sff sfi sfs sft sic sid sie sif sii sis sit ss- ssc ssd sse ssf ssi sss sst stc std ste stf sti sts stt tcc tcd tce tcf tci tcs tct tdc tdd tde tdf tdi tds tdt te- tec ted tee tef tei tes tet tfc tfd tfe tff tfi tfs tft tic tid tie tif tii tis tit tsc tsd tse tsf tsi tss tst ttc ttd tte ttf tti tts ttt