Deciper this code for me

[Raditzu]

I'm going to assume the first guess was closer to being right and continue on.

"THE EerEETef ab1 ylxrf h he cnEr vf fT erqhaqnag uheeeeeee XXXXX"

I'm going to look at two other letters from this: F and H. I'll try two different approaches, here's the first:

F = A
H = I

And the second:

F = I
H = A

Replacements made using the First guess:

THE EerEETeA ab1 ylxrA I Ie cnEr vA AT erqIaqnag uIeeeeeee XXXXX

And replacements with the Second guess:

THE EerEETeI ab1 ylxrI A Ae cnEr vI IT erqAaqnag uAeeeeeee XXXXX