What exactly are you trying to "decode"? If you want the fare rules, you'll have to ask QR or the agent that issued your ticket. You can't parse the rules from the letters themselves. The only letter that matters to most people is the first one, which tells you the underlying RBD and fare brand.

EF doesn't have access to every fare basis under the sun. A lot of fares are private/negotiated/NET/restricted to specific channels.