c-- ccc cce ccf cch cco ce- cec cee cef ceh ceo cfc cfe cff cfh cfo ch- chc che chf chh cho co- coc coe cof coh coo ec- ecc ece ecf ech eco eec eee eef eeo ef- efc efe eff efh efo ehc ehe ehf ehh eho eo- eoc eoe eof eoh eoo fcc fce fcf fco fec fee fef feh feo ffc ffe fff ffh ffo fhc fhe fhf fhh fho foc foe fof foh foo hcc hce hcf hch hco he- hec hee hef heh heo hfc hfe hff hfh hfo hhc hhe hhf hhh hho hoc hoe hof hoh hoo oc- occ ocf och oco oec oee oef oeh oeo of- ofc ofe off ofo ohc ohe ohf ohh oho oo- ooc oof ooh ooo