Shift Vowels

You are tasked with writing a function that takes a string as input and shifts all vowels to the right by one position within the same string. Vowels are defined as 'a', 'e', 'i', 'o', 'u' (case insensitive). For example, the input 'hello' would become 'holle', and 'beautiful' would become 'beutifal'. Other characters should remain unchanged and the function should maintain the case of the letters. Input: A single line string S (1 ≤ |S| ≤ 100). Output: The transformed string with vowels shifted. Example: Input: hello Output: holle