How do I use "encode" and "decode" on the terminal?

[DEFCON 1]

I was browsing through Hudson's E-mail ( ) on the terminal today and I found a message from Weaver that he said needed to be decoded. So I typed in Decode, didn't work, Tried it again didn't work so just to be safe I tried encode and it still didn't work. How do I use these correctly?

[Rissole25]

You type Decode/Encode followed the code/word.

Example: DECODE KHFSJDHSDS342 or ENCODE WASABI

Somethings just won't work however.