CF1921A.Square

A square of positive (strictly greater than $0$) area is located on the coordinate plane, with sides parallel to the coordinate axes. You are given the coordinates of its corners, in random order. Your task is to find the area of the square.

一个面积为正（严格大于 $0$）的正方形位于坐标平面上，其边与坐标轴平行。你将获得该正方形四个顶点的坐标，但顺序是随机的。你的任务是求出该正方形的面积。

Each test consists of several testcases. The first line contains one integer $t$ ($1 \le t \le 100$) — the number of testcases. The following is a description of the testcases.

Each testcase contains four lines, each line contains two integers $x_i, y_i$ ($-1000\le x_i, y_i\le 1000$), coordinates of the corners of the square.

It is guaranteed that there is a square with sides parallel to the coordinate axes, with positive (strictly greater than $0$) area, with corners in given points.

每个测试包含若干个测试用例。第一行包含一个整数 $t$（$1 \le t \le 100$），表示测试用例的数量。接下来是对各测试用例的描述。

每个测试用例包含四行，每行包含两个整数 $x_i, y_i$（$-1000\le x_i, y_i\le 1000$），表示正方形的四个顶点的坐标。

保证存在一个边与坐标轴平行、面积为正（严格大于 $0$）且顶点恰好为给定点的正方形。

For each test case, print a single integer, the area of the square.

对于每个测试用例，输出一个整数，表示正方形的面积。