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:
itfnktrtqphsmjigumfwuntnjhsqmxnqiqnccftnwxzg

Ex Output:
n


Ex Input:
sgmxqncjufirpljrtqieutdntftahocydonromdxstvyuregzm

Ex Output:
t


Ex Input:
wtypbdfihatxyajoneskjplfppvjnnpabjnzbvctki

Ex Output:

p