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 Q]: cycwycamltavkcbwmfiadcbdyriuplpkwijrtttnwtcmqm
[EX A]: c

[EX Q]: hbzhtwvhyokqvhihgwfhwpogehfoenbbwyqxdmlb
[EX A]: h

[EX Q]: gwdtxujzxtlgcbbxiuibqxfdbwfejxokolsvkleoopv
[EX A]:
x