-ic c-- ccc ccd cci cck cco ccs cdc cdd cdi cdk cdo cds ci- cic cid cii cik cio cis ckc ckd cki cko cks co- coc cod coi cok coo cos csc csd csi csk cso css dcc dcd dci dck dco dcs ddc ddd ddi ddk ddo dds di- dic did dii dik dio dis dkc dki dkk dko dks doc dod doi dok doo dos dsc dsd dsi dsk dso dss i-d icc icd ici ick ico ics idc idd idi idk ido ids iic iid iii iio iis ikc iki ikk iko iks io- ioc iod ioi ioo ios is- isc isd isi isk iso iss kcc kcd kci kck kcs kdc kdk kdo kds kic kid kii kik kio kis kkc kki kkk kks koc kod koi kok koo kos ksc ksd ksi ksk kso kss o-i oc- occ ocd oci ock oco ocs odc odd odi odo ods oic oid oii oik oio ois okc okd oki okk oko oks oo- ooc ood ooi ook ooo oos os- osc osd osi osk oso oss scc scd sci sck sco scs sdc sdd sdi sdk sdo sds sic sid sii sik sio sis sk- skc skd ski skk sko sks soc sod soi sok soo sos ss- ssc ssd ssi ssk sso sss