It works 👍✔😊

HINT: You can improve the code by adding a RegEx to check whether the character is alphabetic or not.

[REQUIRED]
1- Use 'let' and 'const' instead of 'var'
2- The code is not formatted
3- The Code is not commented
4- Don't use console.log() inside the code, you can use 'return' to return output from the function
5- Can you handle some base conditions, like if a user adds an EMPTY string or input a non-string thing.
[OPTIONAL]
6 - Can you calculate the time and space complexity of your code

1- time complexity if O(N^2), this can be done with O(N)

This will give O(M*N) ~ O(N), can you optimize it. I feel no need to have an inner loop. You can do the thing using one loop.

1 - How to handle exceptions is JS.

include() time complexity: O(N)

Since you are using include inside a for loop, it will take O(N^2), which is not linear.

You can optimize this solution without using the include(). 👌