-ic c-- ccc ccd ccf cci cck cdc cdd cdf cdi cdk cfc cfd cff cfi cfk ci- cic cid cif cii cik ckc ckd cki dcc dcd dcf dci dck ddc ddd ddf ddi ddk dfc dfd dff dfi dfk di- dic did dif dii dik dkc dki dkk fcc fcd fcf fci fck fdc fdd fdf fdi fdk ffc ffd fff ffi ffk fic fid fif fii fik fkc fkf fki fkk i-d i-f icc icd icf ici ick idc idd idf idi idk ifc ifd iff ifi iic iid iif iii ikc ikf iki ikk kcc kcd kci kck kdc kdf kdk kfc kfd kff kfi kic kid kif kii kik kkc kki kkk