Write a python function that takes a string as an argument. Then converts this string using the following three rules and finally RETURNS a new string to the function call. If the string is one character long, leave it alone. If the string ends with a vowel (a, e, i, o, u), just add ‘yay’ to the beginning of the string. (e.g., “apple” => “yayapple”) Otherwise, the last letter of the string is moved to the front and ‘ay’ is appended to the end (e.g., “dalek” => “kdaleay”) Assume, the argument string will always be in lowercase letters without any spaces. [ You cannot use slicing. You cannot use any built-in functions except input(), len(), split(), list.append(). ]

Write a python function that takes a string as an argument. Then converts this string using the following three rules and finally RETURNS a new string to the function call. If the string is one character long, leave it alone. If the string ends with a vowel (a, e, i, o, u), just add ‘yay’ to the beginning of the string. (e.g., “apple” => “yayapple”) Otherwise, the last letter of the string is moved to the front and ‘ay’ is appended to the end (e.g., “dalek” => “kdaleay”) Assume, the argument string will always be in lowercase letters without any spaces. [ You cannot use slicing. You cannot use any built-in functions except input(), len(), split(), list.append(). ] ================================================

Function call1: function_name("b")

Sample Output 1: b

 

Explanation 1: Here, the length of the string is 1, so no modification was done to it. ================================================

Function call2: function_name("apple")

Sample Output 2: yayapple

 

Explanation 2: Here, the length of the string is greater than 1, and it ends with a vowel. So, “yay” was added at the beginning of the string. ================================================

Function call3: function_name("dalek")

Sample Output 3: kdaleay

 

Explanation 3: Here, the length of the string is greater than 1, and it does not end with a vowel. So, the last character ‘k’ was moved to the beginning of the string, and ‘ay’ was added at the end.