Given a string s, determine if it is valid.

A string is defined as valid if it can be formed by starting with an empty string "" and repeatedly inserting the string "abc" at any position any number of times.

Return true if s is valid, or false otherwise.

Constraints:

• $1 \leq$ s.length $\leq 2 imes 10^4$

• s consists of the characters 'a', 'b', and 'c'

Now, let’s take a moment to make sure you’ve correctly understood the problem. The quiz below helps you check if you’re solving the correct problem:

We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.

Implement your solution in the following coding playground.