import sys
from cmath import phase
from math import degrees
sys.setrecursionlimit(10**7)
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int,sys.stdin.readline().rstrip().split())
def LI(): return list(map(int,sys.stdin.readline().rstrip().split()))
def LI2(): return list(map(int,sys.stdin.readline().rstrip()))
def S(): return sys.stdin.readline().rstrip()
def LS(): return list(sys.stdin.readline().rstrip().split())
def LS2(): return list(sys.stdin.readline().rstrip())


for _ in range(I()):
    T = S()
    XY = [tuple(map(float,S().split())) for _ in range(6)]
    x,y = XY[0]
    theta = phase(complex(x,y))
    a = degrees(theta)
    ans = a+360-60*int((a+360)/60)
    if ans > 59:
        print(0)
    else:
        print(ans)