

'''simple docstring'''
def        _lowerCAmelCase					(						)      ->			Tuple:
     """simple docstring"""




     _SCREAMING_SNAKE_CASE							    =[31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]

     _SCREAMING_SNAKE_CASE							    =6
     _SCREAMING_SNAKE_CASE							    =1
     _SCREAMING_SNAKE_CASE							    =19_01

     _SCREAMING_SNAKE_CASE							    =0

     while year < 20_01:
          day += 7

          if (year % 4 == 0 and year % 1_00 != 0) or (year % 4_00 == 0):
               if day > days_per_month[month - 1] and month != 2:
                    month += 1
                    _SCREAMING_SNAKE_CASE							    =day - days_per_month[month - 2]
               elif day > 29 and month == 2:
                    month += 1
                    _SCREAMING_SNAKE_CASE							    =day - 29
          else:
               if day > days_per_month[month - 1]:
                    month += 1
                    _SCREAMING_SNAKE_CASE							    =day - days_per_month[month - 2]

          if month > 12:
               year += 1
               _SCREAMING_SNAKE_CASE							    =1

          if year < 20_01 and day == 1:
               sundays += 1
     return sundays


if __name__ == "__main__":
     print(solution())


def a__    (       A_					):






  '''simple docstring'''





  if not isinstance(A_,     A_					):
    raise ValueError("""Input series is not valid, valid series - [2, 4, 6]"""					)
  if len(A_					) == 0:
    raise ValueError("""Input list must be a non empty list"""					)
  if len(A_					) == 1:
    return True
  __magic_name__				     =       series[1] - series[0]
  for index in range(len(A_					) - 1					):
    if series[index + 1] - series[index] != common_diff:
      return False
  return True

def a__    (       A_					):






  '''simple docstring'''





  if not isinstance(A_,     A_					):
    raise ValueError("""Input series is not valid, valid series - [2, 4, 6]"""					)
  if len(A_					) == 0:
    raise ValueError("""Input list must be a non empty list"""					)
  __magic_name__				     =       0
  for val in series:
    answer += val
  return answer / len(A_					)


if __name__ == "__main__":
    import doctest

    doctest.testmod()

