-ic c-- ccc ccd cce cci cck ccs cdc cdd cde cdi cdk cds ce- cec ced cee cei cek ces ci- cic cid cie cii cik cis ckc ckd cki cks csc csd cse csi csk css dcc dcd dce dci dck dcs ddc ddd dde ddi ddk dds de- dec ded dee dei dek des di- dic did die dii dik dis dkc dke dki dkk dks dsc dsd dse dsi dsk dss ec- ecc ecd ece eci eck ecs ed- edc edd ede edi edk eds eec eed eee eek ees eic eid eie eii eik eis ekc ekd eke eki eks es- esc esd ese esi esk ess i-d icc icd ice ici ick ics idc idd ide idi idk ids ie- iec ied iee iei iek ies iic iid iie iii iis ikc ike iki ikk iks is- isc isd ise isi isk iss kcc kcd kce kci kck kcs kdc kde kdk kds ke- kec ked kee kei kek kes kic kid kie kii kik kis kkc kke kki kkk kks ksc ksd kse ksi ksk kss scc scd sce sci sck scs sdc sdd sde sdi sdk sds se- sec sed see sei sek ses sic sid sie sii sik sis sk- skc skd ske ski skk sks ss- ssc ssd sse ssi ssk sss