input: Write a function to find the largest three numbers in a given list. If the list contains less than three numbers, return the sorted list. If the list is empty, return an empty list.
  assert find_largest_three([1, 6, 3, 8, 7, 4])==[6, 7, 8]
  assert find_largest_three([9, 2, 5])==[2, 5, 9]
  assert find_largest_three([10])==[10]
  assert find_largest_three([])==[]
  assert find_largest_three([4, 3, 7, 1])==[3, 4, 7]
output: def find_largest_three(lst):
      if len(lst) < 3:
          return sorted(lst)
      return sorted(lst)[-3:]