input: Write a python function to count the frequency of each alphabet in a given string using the Counter class from the collections module.
  assert count_alphabets("The Quick Brown Fox Jumps Over the Lazy Dog") == Counter({'t': 2, 'h': 2, 'e': 3, ' ': 8, 'q': 1, 'u': 2, 'i': 1, 'c': 1, 'k': 1, 'b': 1, 'r': 2, 'o': 4, 'w': 1, 'n': 1, 'f': 1, 'x': 1, 'j': 1, 'm': 1, 'p': 1, 's': 1, 'v': 1, 'l': 1, 'a': 1, 'z': 1, 'y': 1, 'd': 1, 'g': 1})
  assert count_alphabets("Hello World!") == Counter({'h': 1, 'e': 1, 'l': 3, 'o': 2, ' ': 1, 'w': 1, 'r': 1, 'd': 1, '!': 1})
  assert count_alphabets("") == Counter()
output: from collections import Counter
  
  def count_alphabets(s):
      return Counter(s.lower())