-ic c-- ccc ccd ccf cci cco ccr ccs cdc cdd cdf cdi cdo cdr cds cfc cfd cff cfi cfo cfr cfs ci- cic cid cif cii cio cir cis co- coc cod cof coi coo cor cos crc crd crf cri cro crr crs csc csd csf csi cso csr css dcc dcd dcf dci dco dcr dcs ddc ddd ddf ddi ddo ddr dds dfc dfd dff dfi dfo dfr dfs di- dic did dif dii dio dir dis doc dod dof doi doo dor dos drc drd dri dro drr drs dsc dsd dsf dsi dso dsr dss fcc fcd fcf fci fco fcr fcs fdc fdd fdf fdi fdo fdr fds ffc ffd fff ffi ffo ffr ffs fic fid fif fii fir fis foc fof foi foo for fos frc frd frf fri fro frr frs fsc fsd fsf fsi fso fsr fss i-d i-f icc icd icf ici ico icr ics idc idd idf idi ido idr ids ifc ifd iff ifi ifo ifr ifs iic iid iif iii iio iir iis io- ioc iod iof ioi ioo ior ios ir- irc ird irf iri iro irr irs is- isc isd isf isi iso isr iss o-i oc- occ ocd ocf oci oco ocr ocs odc odd odf odi odo odr ods of- ofc ofd off ofi ofo ofr ofs oic oid oif oii oio oir ois oo- ooc ood oof ooi ooo oor oos or- orc ord orf ori oro orr ors os- osc osd osf osi oso osr oss rcc rcd rcf rci rco rcr rcs rdc rdd rdf rdi rdo rdr rds rfc rfd rff rfi rfo rfr rfs ric rid rif rii rio rir ris roc rod rof roi roo ror ros rrc rrd rrf rri rrr rrs rsc rsd rsf rsi rso rsr rss scc scd scf sci sco scr scs sdc sdd sdf sdi sdo sdr sds sfc sfd sff sfi sfo sfr sfs sic sid sif sii sio sir sis soc sod sof soi soo sor sos sr- src srd srf sri sro srr srs ss- ssc ssd ssf ssi sso ssr sss