new_contents: """
  Pangram
  
  A pangram (Greek:παν γράμμα, pan gramma, "every letter") or holoalphabetic sentence for a given alphabet is a sentence using every letter of the alphabet at least once. Perhaps you are familiar with the well known pangram "The quick brown fox jumps over the lazy dog".
  
  But we've found one interesting usage of pangrams, we are using them to train our snipers focus.
  
  For this mission, we will use the latin alphabet (A-Z). You are given a text with latin letters and punctuation symbols. You need to check if the sentence is a pangram or not. Case does not matter.
  
  Input: A text as a string.
  
  Output: Whether the sentence is a pangram or not as a boolean.
  
  Example:
  
  check_pangram("The quick brown fox jumps over the lazy dog.") == True
  check_pangram("ABCDEF.") == False
  Precondition:
  
  Input text can contain only ASCII letters, whitespaces and punctuation symbols.
  
  0 < |text|
  
  How it is used:
  
  Pangrams have been used to display typefaces, test equipment, and develop skills in handwriting, calligraphy, and keyboarding for ages.
  """
  
  
  def check_pangram(text):
      letters = 'abcdefghijklmnopqrstuvwxyz'
      return len(text) and len(set(text.lower()) & set(letters)) == len(letters)
  
  
  if __name__ == '__main__':
      # These "asserts" using only for self-checking and not necessary for
      # auto-testing
      assert check_pangram(
          "The quick brown fox jumps over the lazy dog."), "brown fox"
      assert not check_pangram("ABCDEF"), "ABC"
      assert check_pangram(
          "Bored? Craving a pub quiz fix? Why, just come to the Royal Oak!"), "Bored?"
  
      print("All done? Earn rewards by using the 'Check' button!")
  
subject: Add Pangram