Question $1$: Implement the function catrevers, the function should take the first string and concatenate it

to the reversed second string and return the second updated string. For example, if the first

string is "Final" and the second string is "Exam", then the resulting string should be "maxEFinal"

Write a main function to test your code.

Question$2$: make function that returns the repeating vowels in a string entered by user and print the

repeating vowels in main function.