In this task, you are given a string with duplicate characters ocurring in the string. You need to return the character which is ocurring with the maximum frequency. In case of a tie, return the character with the least ascii value.

Ex Input:
pmrdeazqwlsicttsnzzaqiuobgcgabqkqwthmammlviwcl

Ex Output:
a


Ex Input:
mbfgugcllzjfftchocfzfyltulvcigzhrkqjeuhmsxf

Ex Output:
f


Ex Input:
mqwwpnsxpgpolqmungbzevqlgwgkazdyymynzldpw

Ex Output:

g