c-- ccc cce ccf cch cco ccp ce- cec cee cef ceh ceo cep cfc cfe cff cfh cfo cfp ch- chc che chf chh cho chp co- coc coe cof coh coo cop cpc cpe cpf cph cpo cpp ec- ecc ece ecf ech eco eec eee eef eeo eep ef- efc efe eff efh efo efp ehc ehe ehf ehh eho ehp eo- eoc eoe eof eoh eoo eop ep- epc epe epf eph epo epp fcc fce fcf fco fcp fec fee fef feh feo fep ffc ffe fff ffh ffo ffp fhc fhe fhf fhh fho fhp foc foe fof foh foo fop fpc fpe fph fpo fpp hcc hce hcf hch hco hcp he- hec hee hef heh heo hep hfc hfe hff hfh hfo hfp hhc hhe hhf hhh hho hhp hoc hoe hof hoh hoo hop hpc hpe hpf hph hpo hpp oc- occ ocf och oco ocp oec oee oef oeh oeo oep of- ofc ofe off ofo ofp ohc ohe ohf ohh oho ohp oo- ooc oof ooh ooo oop op- opc ope opf oph opo opp p-p pcc pce pcf pch pco pcp pec pee pef peh peo pep pfc pfe pff pfo pfp phc phe phf pho php poc poe pof poh poo pop ppc ppe ppf pph ppo ppp