input: Write a python function to find if an element exists in a list.
  assert find_element([1, 2, 3, 4, 5], 3) == True
  assert find_element([1, 2, 3, 4, 5], 6) == False
  assert find_element(['a', 'b', 'c'], 'b') == True
output: def find_element(lst, element):
      return element in lst