input: Write a python function to return a list of palindrome numbers within a given range.
  assert palindrome_in_range(100, 200) == [101, 111, 121, 131, 141, 151, 161, 171, 181, 191]
  assert palindrome_in_range(300, 350) == [303, 313, 323, 333, 343]
  assert palindrome_in_range(400, 500) == [404, 414, 424, 434, 444, 454, 464, 474, 484, 494]
output: def palindrome_in_range(start, end):
      palindromes = []
      for num in range(start, end + 1):
          if str(num) == str(num)[::-1]:
              palindromes.append(num)
      return palindromes