input: from typing import List
  
  def sort_ascending(array: List[int]) -> List[int]:
      """ Sorts the given array in ascending order.
      >>> sort_ascending([10, 3, 9, 1, 15, 2])
      [1, 2, 3, 9, 10, 15]
      """
      array.sort()
      return array
output:     array.sort()
      return array