-ic c-- ccc ccd cce cci cck cco ccs cdc cdd cde cdi cdk cdo cds ce- cec ced cee cei cek ceo ces ci- cic cid cie cii cik cio cis ckc ckd cki cko cks co- coc cod coe coi cok coo cos csc csd cse csi csk cso css dcc dcd dce dci dck dco dcs ddc ddd dde ddi ddk ddo dds de- dec ded dee dei dek deo des di- dic did die dii dik dio dis dkc dke dki dkk dko dks doc dod doe doi dok doo dos dsc dsd dse dsi dsk dso dss ec- ecc ecd ece eci eck eco ecs ed- edc edd ede edi edk edo eds eec eed eee eek eeo ees eic eid eie eii eik eio eis ekc ekd eke eki eko eks eo- eoc eod eoe eoi eok eoo eos es- esc esd ese esi esk eso ess i-d icc icd ice ici ick ico ics idc idd ide idi idk ido ids ie- iec ied iee iei iek ies iic iid iie iii iio iis ikc ike iki ikk iko iks io- ioc iod ioe ioi ioo ios is- isc isd ise isi isk iso iss kcc kcd kce kci kck kcs kdc kde kdk kdo kds ke- kec ked kee kei kek keo kes kic kid kie kii kik kio kis kkc kke kki kkk kks koc kod koe koi kok koo kos ksc ksd kse ksi ksk kso kss o-i oc- occ ocd oci ock oco ocs odc odd ode odi odo ods oec oed oee oei oeo oes oic oid oie oii oik oio ois okc okd oke oki okk oko oks oo- ooc ood ooi ook ooo oos os- osc osd ose osi osk oso oss scc scd sce sci sck sco scs sdc sdd sde sdi sdk sdo sds se- sec sed see sei sek seo ses sic sid sie sii sik sio sis sk- skc skd ske ski skk sko sks soc sod soe soi sok soo sos ss- ssc ssd sse ssi ssk sso sss