Currently, Regex checking is used in conjunction with iteration. This
pattern of coding is frowned upon due to the excessive Regex pattern
compilation, causing the program to run slower and consume more
memory.

By moving the Regex pattern compilation outside of the iteration, and
by using `Matcher` objects to check if the strings match the Regex
performance, we can potentially remove this performance bottleneck.

Let's move to refactor the code and remove such instances of Regex use
in iterative loops.