import math
import sys


def input(): return sys.stdin.readline().rstrip()


def main():
    N = int(input())

    for i in range(N):
        for i in range(7):
            s = input()
        x, y = map(float, s.split())
        theta = math.atan2(y, x) / math.pi * 180
        ans = (theta+5) % 60 - 5
        print(ans)


if __name__ == '__main__':
    main()