text: #   a212_frequency.py
  #   Counts letters in a given string
  
  def char_frequency(str1):
      dict = {}
      for n in str1:
          keys = dict.keys()
          if n in keys:
              dict[n] += 1
          else:
              dict[n] = 1
      return dict
  
  phrase = input("Enter the string to analyze: ")
  count_letters = char_frequency(phrase)
  
  for keys, values in count_letters.items():
    print(keys, ":", values)
  