input: Write a python function to find the most frequent element in a list using the Counter class from the collections module.
  assert most_frequent([2, 3, 4, 2, 5, 3]) == 2
  assert most_frequent([1, 1, 2, 2, 3]) == 1
  assert most_frequent([5, 5, 5, 6, 6, 6, 6]) == 6
output: from collections import Counter
  
  def most_frequent(lst):
      count = Counter(lst)
      return count.most_common(1)[0][0]