Odd/Even on an airway

Hi all!
I bought Navigraph Charts but I can’t figure out how to determine if the route on an airway should be done at an odd or even flight level.
For example, I will fly from ILDIN to XIVMA on A611. How can I determine odd or even without errors? Applicate the standard rules can be an error f on this airway there’s a strange rules (for example on my country we have L615 airway that not follow standard rules north/south. How can I discover this on Navigraph Charts?)