-ic c-- ccc ccd ccf cci cck cco ccs cdc cdd cdf cdi cdk cdo cds cfc cfd cff cfi cfk cfo cfs ci- cic cid cif cii cik cio cis ckc ckd cki cko cks co- coc cod cof coi cok coo cos csc csd csf csi csk cso css dcc dcd dcf dci dck dco dcs ddc ddd ddf ddi ddk ddo dds dfc dfd dff dfi dfk dfo dfs di- dic did dif dii dik dio dis dkc dki dkk dko dks doc dod dof doi dok doo dos dsc dsd dsf dsi dsk dso dss fcc fcd fcf fci fck fco fcs fdc fdd fdf fdi fdk fdo fds ffc ffd fff ffi ffk ffo ffs fic fid fif fii fik fis fkc fkf fki fkk foc fof foi fok foo fos fsc fsd fsf fsi fsk fso fss i-d i-f icc icd icf ici ick ico ics idc idd idf idi idk ido ids ifc ifd iff ifi ifo ifs iic iid iif iii iio iis ikc ikf iki ikk iko iks io- ioc iod iof ioi ioo ios is- isc isd isf isi isk iso iss kcc kcd kci kck kcs kdc kdf kdk kdo kds kfc kfd kff kfi kfo kfs kic kid kif kii kik kio kis kkc kki kkk kks koc kod kof koi kok koo kos ksc ksd ksf ksi ksk kso kss o-i oc- occ ocd ocf oci ock oco ocs odc odd odf odi odo ods of- ofc ofd off ofi ofo ofs oic oid oif oii oik oio ois okc okd oki okk oko oks oo- ooc ood oof ooi ook ooo oos os- osc osd osf osi osk oso oss scc scd scf sci sck sco scs sdc sdd sdf sdi sdk sdo sds sfc sfd sff sfi sfk sfo sfs sic sid sif sii sik sio sis sk- skc skd skf ski skk sko sks soc sod sof soi sok soo sos ss- ssc ssd ssf ssi ssk sso sss