input: Write a python function to move elements greater than or equal to 5 to the right side of the array.
  assert move_greater_elements([3, 8, 2, 7, 1, 5]) == [3, 1, 2, 5, 7, 8]
  assert move_greater_elements([10, 4, 6, 2, 1, 5]) == [4, 1, 2, 5, 6, 10]
  assert move_greater_elements([9, 8, 7, 6, 5, 4, 3, 2, 1]) == [4, 3, 2, 1, 5, 6, 7, 8, 9]
output: def move_greater_elements(arr):
      less_than_five = [x for x in arr if x < 5]
      greater_or_equal_five = [x for x in arr if x >= 5]
      return less_than_five + greater_or_equal_five