-ic c-- ccc ccd cci cck cco cdc cdd cdi cdk cdo ci- cic cid cii cik cio ckc ckd cki cko co- coc cod coi cok coo dcc dcd dci dck dco ddc ddd ddi ddk ddo di- dic did dii dik dio dkc dki dkk dko doc dod doi dok doo i-d icc icd ici ick ico idc idd idi idk ido iic iid iii iio ikc iki ikk iko io- ioc iod ioi ioo kcc kcd kci kck kdc kdk kdo kic kid kii kik kio kkc kki kkk koc kod koi kok koo o-i oc- occ ocd oci ock oco odc odd odi odo oic oid oii oik oio okc okd oki okk oko oo- ooc ood ooi ook ooo