input: Write a python function to find the element with the maximum frequency in a list.
  assert max_frequency_element([1, 4, 2, 6, 2, 1, 2, 9]) == 2
  assert max_frequency_element([5, 1, 5, 2, 5, 3]) == 5
  assert max_frequency_element([4, 4, 4, 4, 4, 4]) == 4
output: def max_frequency_element(lst):
      from collections import Counter
      counter = Counter(lst)
      return counter.most_common(1)[0][0]