input: Write a function to get every other element from a list.
  assert every_other_sublist([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]) == [1, 3, 5, 7, 9]
  assert every_other_sublist([10, 20, 30, 40, 50]) == [10, 30, 50]
  assert every_other_sublist([5, 10, 15, 20, 25, 30, 35]) == [5, 15, 25, 35]
output: def every_other_sublist(lst):
      return lst[::2]