-ic c-- ccc ccd cci cco ccs cct cdc cdd cdi cdo cds cdt ci- cic cid cii cio cis cit co- coc cod coi coo cos cot csc csd csi cso css cst ctc ctd cti cto cts ctt dcc dcd dci dco dcs dct ddc ddd ddi ddo dds ddt di- dic did dii dio dis dit doc dod doi doo dos dot dsc dsd dsi dso dss dst dtc dtd dti dto dts dtt i-d icc icd ici ico ics ict idc idd idi ido ids idt iic iid iii iio iis iit io- ioc iod ioi ioo ios iot is- isc isd isi iso iss ist itc itd iti ito its itt o-i oc- occ ocd oci oco ocs oct odc odd odi odo ods odt oic oid oii oio ois oit oo- ooc ood ooi ooo oos oot os- osc osd osi oso oss ost ot- otc otd oti oto ots ott scc scd sci sco scs sct sdc sdd sdi sdo sds sdt sic sid sii sio sis sit soc sod soi soo sos sot ss- ssc ssd ssi sso sss sst stc std sti sto sts stt tcc tcd tci tco tcs tct tdc tdd tdi tdo tds tdt tic tid tii tio tis tit to- toc tod toi too tos tot tsc tsd tsi tso tss tst ttc ttd tti tto tts ttt