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:
nxgekghukdfdajwycepmwmdvzbhznmdpugmomyupcunjpbmee

Ex Output:
m


Ex Input:
tzrraklcaztmvloaykewzxzkxjnpnotqkjnbxxfuslup

Ex Output:
k


Ex Input:
xkfrrlswmkxmkqycyjzdeqpxbkihtyljcbrpaqeluh

Ex Output:

k