How to find uncommon elements from three arrays?

There might be some other better answers. But here is the most simple one.

1. On line 4 I took the Intersection of 3 sets
2. On line 7 I took the Union of three sets
3. On line 10 the difference or XOR operation, of Union and intersection

I hope it helps:-

>>> a = {1,2,3,4}
>>> b = {8,1,2,3}
>>> c = {1,2,9,3}

>>> d = a & b & c
>>> print(d)
{1, 2, 3}

>>> e = a | b | c
>>> print(e)
{1, 2, 3, 4, 8, 9}

>>> f = d^e
>>> print(f)
{4, 8, 9}