c-- ccc ccf cch cco ccr cfc cff cfh cfo cfr ch- chc chf chh cho chr co- coc cof coh coo cor crc crf crh cro crr fcc fcf fco fcr ffc fff ffh ffo ffr fhc fhf fhh fho fhr foc fof foh foo for frc frf frh fro frr hcc hcf hch hco hcr hfc hff hfh hfo hfr hhc hhf hhh hho hhr hoc hof hoh hoo hor hr- hrc hrf hrh hro hrr oc- occ ocf och oco ocr of- ofc off ofo ofr ohc ohf ohh oho ohr oo- ooc oof ooh ooo oor or- orc orf orh oro orr rcc rcf rch rco rcr rfc rff rfh rfo rfr rh- rhc rhf rhh rho rhr roc rof roh roo ror rrc rrf rrh rrr