-ic c-- ccc ccd cce ccf cci cck cco ccs cdc cdd cde cdf cdi cdk cdo cds ce- cec ced cee cef cei cek ceo ces cfc cfd cfe cff cfi cfk cfo cfs ci- cic cid cie cif cii cik cio cis ckc ckd cki cko cks co- coc cod coe cof coi cok coo cos csc csd cse csf csi csk cso css dcc dcd dce dcf dci dck dco dcs ddc ddd dde ddf ddi ddk ddo dds de- dec ded dee def dei dek deo des dfc dfd dfe dff dfi dfk dfo dfs di- dic did die dif dii dik dio dis dkc dke dki dkk dko dks doc dod doe dof doi dok doo dos dsc dsd dse dsf dsi dsk dso dss ec- ecc ecd ece ecf eci eck eco ecs ed- edc edd ede edf edi edk edo eds eec eed eee eef eek eeo ees ef- efc efd efe eff efi efo efs eic eid eie eif eii eik eio eis ekc ekd eke ekf eki eko eks eo- eoc eod eoe eof eoi eok eoo eos es- esc esd ese esf esi esk eso ess fcc fcd fce fcf fci fck fco fcs fdc fdd fde fdf fdi fdk fdo fds fec fed fee fef fei fek feo fes ffc ffd ffe fff ffi ffk ffo ffs fic fid fie fif fii fik fis fkc fkf fki fkk foc foe fof foi fok foo fos fsc fsd fse fsf fsi fsk fso fss i-d i-f icc icd ice icf ici ick ico ics idc idd ide idf idi idk ido ids ie- iec ied iee ief iei iek ies ifc ifd ife iff ifi ifo ifs iic iid iie iif iii iio iis ikc ike ikf iki ikk iko iks io- ioc iod ioe iof ioi ioo ios is- isc isd ise isf isi isk iso iss kcc kcd kce kci kck kcs kdc kde kdf kdk kdo kds ke- kec ked kee kef kei kek keo kes kfc kfd kff kfi kfo kfs kic kid kie kif kii kik kio kis kkc kke kki kkk kks koc kod koe kof koi kok koo kos ksc ksd kse ksf ksi ksk kso kss o-i oc- occ ocd ocf oci ock oco ocs odc odd ode odf odi odo ods oec oed oee oef oei oeo oes of- ofc ofd ofe off ofi ofo ofs oic oid oie oif oii oik oio ois okc okd oke oki okk oko oks oo- ooc ood oof ooi ook ooo oos os- osc osd ose osf osi osk oso oss scc scd sce scf sci sck sco scs sdc sdd sde sdf sdi sdk sdo sds se- sec sed see sef sei sek seo ses sfc sfd sfe sff sfi sfk sfo sfs sic sid sie sif sii sik sio sis sk- skc skd ske skf ski skk sko sks soc sod soe sof soi sok soo sos ss- ssc ssd sse ssf ssi ssk sso sss