input: Write a function to find the largest three numbers in a list. If the list has fewer than three numbers, return the entire sorted list.
  assert find_largest_three([1, 6, 3, 8, 7, 4])==[6, 7, 8]
  assert find_largest_three([9, 1, 5])==[1, 5, 9]
  assert find_largest_three([2])==[2]
  assert find_largest_three([4, 7, 3, 2, 1])==[3, 4, 7]
  assert find_largest_three([])==[]
output: def find_largest_three(nums):
      if len(nums) < 3:
          return sorted(nums)
      return sorted(nums)[-3:]