c-- ccc ccf cch cco ccr ccs cfc cff cfh cfo cfr cfs ch- chc chf chh cho chr chs co- coc cof coh coo cor cos crc crf crh cro crr crs csc csf csh cso csr css fcc fcf fco fcr fcs ffc fff ffh ffo ffr ffs fhc fhf fhh fho fhr fhs foc fof foh foo for fos frc frf frh fro frr frs fsc fsf fsh fso fsr fss hcc hcf hch hco hcr hcs hfc hff hfh hfo hfr hfs hhc hhf hhh hho hhr hhs hoc hof hoh hoo hor hos hr- hrc hrf hrh hro hrr hrs hsc hsf hsh hsr hss oc- occ ocf och oco ocr ocs of- ofc off ofo ofr ofs ohc ohf ohh oho ohr ohs oo- ooc oof ooh ooo oor oos or- orc orf orh oro orr ors os- osc osf osh oso osr oss rcc rcf rch rco rcr rcs rfc rff rfh rfo rfr rfs rh- rhc rhf rhh rho rhr rhs roc rof roh roo ror ros rrc rrf rrh rrr rrs rsc rsf rsh rso rsr rss scc scf sch sco scr scs sfc sff sfh sfo sfr sfs sh- shc shf shh sho shr shs soc sof soh soo sor sos sr- src srf srh sro srr srs ss- ssc ssf ssh sso ssr sss