Need help solving a problem

Hey

I really need help on my programming assignment. I’ve been thinking about it for hours and just can’t come up with an algorithm to solve it. It’s a mind fuck. Whatever I think of doesn’t work. I also have to give it away in 2 hours.

Here it is:

There are n (1 ≤ n ≤ 100) sheets of paper with various dimensions. Every sheet is divided by 2 lines into 4 rectangular parts. The dimensions (length and width) for those 4 parts are known (entered via console). Find the dimensions of each sheet of paper.

All numbers are integers.

E.g.

From keyboard:
1                  // one sheet of paper
3 2 8 3 7 2 8 7    // dimensions for each part. Part1 would be three units long and two units wide ; etc…

Answer:
10 10

#!/usr/bin/python

for i in xrange(int(raw_input())):
    l = map(int, raw_input().split())
    cdr = [(l.pop(), l.pop()) for _ in range(4)]
    car = cdr.pop()

    print filter(None, [a == x and b + y or b == x and a + y or 0 for (a, b) in cdr for (x, y) in (car, car[::-1])])

You're welcome.