I shouldn't give in so easily having got so far, the entries do have a logic to them. Maybe I didn't express it clearly earlier.
For example, if you take 27 and 28 they only share 3 common letters. But you know that 28 cannot be entered inwards or outwards as in either case it wouldn't share those letters with 27. Therefore 28 must be jumbled, which in turn means that 27 and 29 cannot be. The same methodology can be employed for many of the other pairs.