Suppose that you are required to write a function that receives a string as an input and reverses the order of the alphabetical characters in the string while keeping the rest of the characters in place.

Example: $,$ input $=$ "Tax$-$i$"$

output $=$ "ixa$-$T$"$

input $=$ "sar$12$ra$.$s$"$

Your function needs to return an error message for invalid input type and return error message for an input string that does not contain any alphabetical characters in the input string.

Given this information, your task for this quiz is as follows. In a jupyter$-$notebook, using Python:

Write error classes for the two error types $(10$ points$).$

Write test cases for the error types $(30$ points$)$

Write test cases for the function itself $(30$ points