write a go solution for Description:
You are given a tube which is reflective inside represented as two non-coinciding, but parallel to Ox lines. Each line has some special integer points — positions of sensors on sides of the tube.

You are going to emit a laser ray in the tube. To do so, you have to choose two integer points A and B on the first and the second line respectively (coordinates can be negative): the point A is responsible for the position of the laser, and the point B — for the direction of the laser ray. The laser ray is a ray starting at A and directed at B which will reflect from the sides of the tube (it doesn't matter if there are any sensors at a reflection point or not). A sensor will only register the ray if the ray hits exactly at the position of the sensor.

Examples of laser rays. Note that image contains two examples. The 3 sensors (denoted by black bold points on the tube sides) will register the blue ray but only 2 will register the red.

Calculate the maximum number of sensors which can register your ray if you choose points A and B on the first and the second lines respectively.

Input Format:
The first line contains two integers n and y_1 (1<=n<=10^5, 0<=y_1<=10^9) — number of sensors on the first line and its y coordinate.

The second line contains n integers a_1,a_2,ldots,a_n (0<=a_i<=10^9) — x coordinates of the sensors on the first line in the ascending order.

The third line contains two integers m and y_2 (1<=m<=10^5, y_1<y_2<=10^9) — number of sensors on the second line and its y coordinate.

The fourth line contains m integers b_1,b_2,ldots,b_m (0<=b_i<=10^9) — x coordinates of the sensors on the second line in the ascending order.

Output Format:
Print the only integer — the maximum number of sensors which can register the ray.

Note:
One of the solutions illustrated on the image by pair A_2 and B_2.. Output only the code with no comments, explanation, or additional text.