input: Write a function to find the largest three numbers in a list. The function should take a list as input and return a list of the largest three numbers sorted in non-decreasing order. If the list has fewer than three numbers, the function should return the entire list sorted.
  assert find_largest_three([1, 6, 3, 8, 7, 4])==[6, 7, 8]
  assert find_largest_three([1, 6])==[1, 6]
  assert find_largest_three([5, 4, 3, 2, 1])==[3, 4, 5]
  assert find_largest_three([])==[]
output: def find_largest_three(lst):
      return sorted(lst)[-3:] if len(lst) >= 3 else sorted(lst)