Have read various things that give the / f bc=y construction, but have not seen anywhere this combined with specific instructions across different airlines.

I am trying to find the following, what would be the complete syntax?

HKG-HND CX / fc=x
HND-YYZ AC / f bc=y|bc=b|bc=e|bc=h|bc=m|bc=n|bc=o|bc=v
YYZ-NRT AC / f bc=y|bc=b|bc=e|bc=h|bc=m|bc=n|bc=o|bc=v
NRT-HKG CX / fc=x

Obviously I can't put: CX AC AC / f bc=y|bc=b|bc=e|bc=h|bc=m|bc=n|bc=o|bc=v as this is trying to apply those booking classes to the CX flights as well, which messes it up.