Given the task definition, example input & output, solve the new input case.
In this task, you are given a string with unique characters in it and you need to return the character from the string which has the maximum ASCII value. ASCII stands for American Standard Code For Information Interchange and It assigns a unique number to each character. The characters [a - z] have an ASCII range of 97-122 and [A-Z] have an ASCII range of 65-90 respectively.
Example: aBxyZde
Output: y
y has the maximum ascii value in the given string.

New input case for you: dDzqEKABwRO
Output:
z