c-- ccc ccf cch cco ccp ccs cfc cff cfh cfo cfp cfs ch- chc chf chh cho chp chs co- coc cof coh coo cop cos cpc cpf cph cpo cpp cps csc csf csh cso csp css fcc fcf fco fcp fcs ffc fff ffh ffo ffp ffs fhc fhf fhh fho fhp fhs foc fof foh foo fop fos fpc fph fpo fpp fps fsc fsf fsh fso fsp fss hcc hcf hch hco hcp hcs hfc hff hfh hfo hfp hfs hhc hhf hhh hho hhp hhs hoc hof hoh hoo hop hos hpc hpf hph hpo hpp hps hsc hsf hsh hsp hss oc- occ ocf och oco ocp ocs of- ofc off ofo ofp ofs ohc ohf ohh oho ohp ohs oo- ooc oof ooh ooo oop oos op- opc opf oph opo opp ops os- osc osf osh oso osp oss p-p pcc pcf pch pco pcp pcs pfc pff pfo pfp pfs phc phf pho php phs poc pof poh poo pop pos ppc ppf pph ppo ppp pps ps- psc psf psh pso psp pss scc scf sch sco scp scs sfc sff sfh sfo sfp sfs sh- shc shf shh sho shp shs soc sof soh soo sop sos spc spf sph spo spp sps ss- ssc ssf ssh sso ssp sss