-ic c-- ccc ccd cci cco cct cdc cdd cdi cdo cdt ci- cic cid cii cio cit co- coc cod coi coo cot ctc ctd cti cto ctt dcc dcd dci dco dct ddc ddd ddi ddo ddt di- dic did dii dio dit doc dod doi doo dot dtc dtd dti dto dtt i-d icc icd ici ico ict idc idd idi ido idt iic iid iii iio iit io- ioc iod ioi ioo iot itc itd iti ito itt o-i oc- occ ocd oci oco oct odc odd odi odo odt oic oid oii oio oit oo- ooc ood ooi ooo oot ot- otc otd oti oto ott tcc tcd tci tco tct tdc tdd tdi tdo tdt tic tid tii tio tit to- toc tod toi too tot ttc ttd tti tto ttt