Why u dun liek mudkipz?

Logic Level 4

$$\large\begin{array} &&T&R&E&E&C&K&O \\ +\ \ &T&O&R&C&H&i&C \\ \hline \ \ S&T&a&R&T&E&R&S \end{array}$$

Given:

$$1) K=5$$

$$2)$$ Lower-case alphabets are wildcards, they can represent a number which is already represented by a upper-case alphabet.

Find $$\overline{TREECKO}-\overline{TORCHiC}$$

This problem is part of the question set Mathematics in Anime