input: Write a function that identifies numbers within a specified range where each number is divisible by all of its individual digits.
  assert divisible_by_digits(1,22)==[1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 15, 22]
  assert divisible_by_digits(1,15)==[1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 15]
  assert divisible_by_digits(20,25)==[22, 24]
output: def divisible_by_digits(start, end):
      def is_divisible_by_digits(num):
          str_num = str(num)
          for digit in str_num:
              if digit == '0' or num % int(digit) != 0:
                  return False
          return True
      
      result = []
      for number in range(start, end + 1):
          if is_divisible_by_digits(number):
              result.append(number)
      return result