-ic c-- ccc ccd ccf cci cck cco ccr ccs cdc cdd cdf cdi cdk cdo cdr cds cfc cfd cff cfi cfk cfo cfr cfs ci- cic cid cif cii cik cio cir cis ckc ckd cki cko cks co- coc cod cof coi cok coo cor cos crc crd crf cri crk cro crr crs csc csd csf csi csk cso csr css dcc dcd dcf dci dck dco dcr dcs ddc ddd ddf ddi ddk ddo ddr dds dfc dfd dff dfi dfk dfo dfr dfs di- dic did dif dii dik dio dir dis dkc dki dkk dko dkr dks doc dod dof doi dok doo dor dos drc drd dri drk dro drr drs dsc dsd dsf dsi dsk dso dsr dss fcc fcd fcf fci fck fco fcr fcs fdc fdd fdf fdi fdk fdo fdr fds ffc ffd fff ffi ffk ffo ffr ffs fic fid fif fii fik fir fis fkc fkf fki fkk foc fof foi fok foo for fos frc frd frf fri frk fro frr frs fsc fsd fsf fsi fsk fso fsr fss i-d i-f icc icd icf ici ick ico icr ics idc idd idf idi idk ido idr ids ifc ifd iff ifi ifo ifr ifs iic iid iif iii iio iir iis ikc ikf iki ikk iko ikr iks io- ioc iod iof ioi ioo ior ios ir- irc ird irf iri irk iro irr irs is- isc isd isf isi isk iso isr iss kcc kcd kci kck kcr kcs kdc kdf kdk kdo kdr kds kfc kfd kff kfi kfo kfs kic kid kif kii kik kio kir kis kkc kki kkk kkr kks koc kod kof koi kok koo kor kos krc krd krf kri krk kro krr krs ksc ksd ksf ksi ksk kso ksr kss o-i oc- occ ocd ocf oci ock oco ocr ocs odc odd odf odi odo odr ods of- ofc ofd off ofi ofo ofr ofs oic oid oif oii oik oio oir ois okc okd oki okk oko okr oks oo- ooc ood oof ooi ook ooo oor oos or- orc ord orf ori ork oro orr ors os- osc osd osf osi osk oso osr oss rcc rcd rcf rci rco rcr rcs rdc rdd rdf rdi rdo rdr rds rfc rfd rff rfi rfk rfo rfr rfs ric rid rif rii rik rio rir ris rkc rkf rkk rko rks roc rod rof roi rok roo ror ros rrc rrd rrf rri rrk rrr rrs rsc rsd rsf rsi rsk rso rsr rss scc scd scf sci sck sco scr scs sdc sdd sdf sdi sdk sdo sdr sds sfc sfd sff sfi sfk sfo sfr sfs sic sid sif sii sik sio sir sis sk- skc skd skf ski skk sko skr sks soc sod sof soi sok soo sor sos sr- src srd srf sri srk sro srr srs ss- ssc ssd ssf ssi ssk sso ssr sss