input: Write a Python function to identify numbers in a specified range that are evenly divisible by each of their 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(n):
          for digit in str(n):
              if digit == '0' or n % int(digit) != 0: 
                  return False
          return True
  
      result = []
      for i in range(start, end + 1):
          if is_divisible_by_digits(i):
              result.append(i)
      return result