Construct four points a, b, c and d on the two-dimensional plane that satisfy the following conditions:
- x and y coordinates of all points are integers, and their absolute values don't exceed 109
- a and b are different, and c and d are different.
- Let l be the line passing through a and b, and let m be the line passing through c and d.
Then,
- l and m are not parallel.
- the absolute values of x and y coordinates of the cross point of l and m are not less than 1027.