input: Write a function to find the largest three numbers in a list.
  
  assert find_largest_three([1, 6, 3, 8, 7, 4])==[6, 7, 8]
  assert find_largest_three([9, 1, 2, 4, 8, 3])==[4, 8, 9]
  assert find_largest_three([10, 5, 2, 1, 3])==[5, 3, 10]
  assert find_largest_three([1, 2, 3, 4, 5])==[3, 4, 5]
  assert find_largest_three([-1, -2, -3, -4, -5])==[-3, -2, -1]
output: def find_largest_three(nums):
      nums.sort()
      return nums[-3:][::-1]