The problem is:
`Find the Number of Vowels in a String (Without Counting Duplicates)
Problem Statement: Write a program that asks the user to input a string. The program should count and display the total number of unique vowels (a, e, i, o, u) in the string, regardless of whether they are uppercase or lowercase. You must handle both capital and small letters. If a vowel appears more than once, count it only once.`
If u know python, you'll have no problem solving this.
I just need the code. >__<