The XOR sum of a list is the bitwise `XOR` of all its elements. If the list only contains one element, then its XOR sum will be equal to this element.

- For example, the XOR sum of `[1,2,3,4]` is equal to `1 XOR 2 XOR 3 XOR 4 = 4`, and the XOR sum of `[3]` is equal to `3`.

You are given two 0-indexed arrays `arr1` and `arr2` that consist only of non-negative integers.

Consider the list containing the result of `arr1[i] AND arr2[j]` (bitwise `AND`) for every `(i, j)` pair where `0 <= i < arr1.length` and `0 <= j < arr2.length`.

Return the XOR sum of the aforementioned list.

Example 1:

    Input: arr1 = [1,2,3], arr2 = [6,5]
    Output: 0
    Explanation: The list = [1 AND 6, 1 AND 5, 2 AND 6, 2 AND 5, 3 AND 6, 3 AND 5] = [0,1,2,0,2,1].
    The XOR sum = 0 XOR 1 XOR 2 XOR 0 XOR 2 XOR 1 = 0.

Example 2:

    Input: arr1 = [12], arr2 = [4]
    Output: 4
    Explanation: The list = [12 AND 4] = [4]. The XOR sum = 4.

Constraints:

- `1 <= arr1.length, arr2.length <= 105`
- `0 <= arr1[i], arr2[j] <= 109`