input: Write a function to check if an element exists in a list.
  assert element_exists([2, 5, 7, 8, 11, 13], 8) == "Found!"
  assert element_exists([2, 5, 7, 8, 11, 13], 10) == "Not Found"
  assert element_exists([1, 2, 3, 4, 5], 4) == "Found!"
  assert element_exists([1, 2, 3, 4, 5], 6) == "Not Found"
output: def element_exists(lst, element):
      if element in lst:
          return "Found!"
      else:
          return "Not Found"