char getMaxOccCharacter(string s) {
  int arr[26] = {0};
  for (int i = 0; i < s.length(); i++) {
    char ch = s[i];
    int number = 0;
    number = ch - 'a';
    arr[number]++;
  }
  int maxi = -1, ans = 0;
  for (int i = 0; i < 26; i++) {
    if (arr[i] > maxi) {
      maxi = arr[i];
      ans = i;
    }
  }
  return 'a' + ans;
}