If 'CAT' and 'BOAT' are written as 'XZG' and 'YLZG' respectively in a code language, how is 'EGG' to be written in the same language?

The coding scheme maps each letter to its exact opposite or reverse alphabetical pair (where the sum of positional ranks is $27$):
* $\text{C}(3)\leftrightarrow \text{X}(24)$
* $\text{A}(1)\leftrightarrow \text{Z}(26)$
* $\text{T}(20)\leftrightarrow \text{G}(7)$
* $\text{B}(2)\leftrightarrow \text{Y}(25)$
* $\text{O}(15)\leftrightarrow \text{L}(12)$

Following this rule for 'EGG':

* $\text{E}(5)\to 27-5=22\to \text{V}$
* $\text{G}(7)\to 27-7=20\to \text{T}$
* $\text{G}(7)\to 27-7=20\to \text{T}$

Thus, 'EGG' is coded as 'VTT'.