-ic c-- ccc ccd ccf cci cck cco ccr cdc cdd cdf cdi cdk cdo cdr cfc cfd cff cfi cfk cfo cfr ci- cic cid cif cii cik cio cir ckc ckd cki cko co- coc cod cof coi cok coo cor crc crd crf cri crk cro crr dcc dcd dcf dci dck dco dcr ddc ddd ddf ddi ddk ddo ddr dfc dfd dff dfi dfk dfo dfr di- dic did dif dii dik dio dir dkc dki dkk dko dkr doc dod dof doi dok doo dor drc drd dri drk dro drr fcc fcd fcf fci fck fco fcr fdc fdd fdf fdi fdk fdo fdr ffc ffd fff ffi ffk ffo ffr fic fid fif fii fik fir fkc fkf fki fkk foc fof foi fok foo for frc frd frf fri frk fro frr i-d i-f icc icd icf ici ick ico icr idc idd idf idi idk ido idr ifc ifd iff ifi ifo ifr iic iid iif iii iio iir ikc ikf iki ikk iko ikr io- ioc iod iof ioi ioo ior ir- irc ird irf iri irk iro irr kcc kcd kci kck kcr kdc kdf kdk kdo kdr kfc kfd kff kfi kfo kic kid kif kii kik kio kir kkc kki kkk kkr koc kod kof koi kok koo kor krc krd krf kri krk kro krr o-i oc- occ ocd ocf oci ock oco ocr odc odd odf odi odo odr of- ofc ofd off ofi ofo ofr oic oid oif oii oik oio oir okc okd oki okk oko okr oo- ooc ood oof ooi ook ooo oor or- orc ord orf ori ork oro orr rcc rcd rcf rci rco rcr rdc rdd rdf rdi rdo rdr rfc rfd rff rfi rfk rfo rfr ric rid rif rii rik rio rir rkc rkf rkk rko roc rod rof roi rok roo ror rrc rrd rrf rri rrk rrr