-ic c-- ccc ccd cce cci cck cdc cdd cde cdi cdk ce- cec ced cee cei cek ci- cic cid cie cii cik ckc ckd cki dcc dcd dce dci dck ddc ddd dde ddi ddk de- dec ded dee dei dek di- dic did die dii dik dkc dke dki dkk ec- ecc ecd ece eci eck ed- edc edd ede edi edk eec eed eee eek eic eid eie eii eik ekc ekd eke eki i-d icc icd ice ici ick idc idd ide idi idk ie- iec ied iee iei iek iic iid iie iii ikc ike iki ikk kcc kcd kce kci kck kdc kde kdk ke- kec ked kee kei kek kic kid kie kii kik kkc kke kki kkk