from cmath import phase, pi
EPS = 1e-9
for _ in range(int(input())):
    input()
    for _ in range(6):
        phi = 180 * phase(complex(*map(float, input().split()))) / pi
        if 0 <= phi <= 50 + EPS:
            print(phi)
        elif -EPS <= phi:
            print(0)