def eq(a, b):
        return abs(a - b) < 1e-6

def dist(a, b):
        return ((a[0] - b[0])**2 + (a[1] - b[1])**2)**.5

def parallel(a, b, c, d):
        p = [i - j for (i, j) in zip(a, c)]
        q = [i - j for (i, j) in zip(b, d)]
        return eq(p[0], q[0]) and eq(p[1], q[1])

def cross_product(a, b, c):
        p = [i - j for (i, j) in zip(a, b)]
        q = [i - j for (i, j) in zip(c, b)]
        return p[0] * q[1] - p[1] * q[0]

def isParallelogram(coords):
        return parallel(coords[0], coords[1], coords[3], coords[2]) and parallel(coords[1], coords[2], coords[0], coords[3]) and not eq(cross_product(coords[1], coords[0], coords[2]), 0)

def check(coords):
        for i in permutations(range(4)):
                if isParallelogram([x[1] for x in sorted(zip(i, coords))]):
                        print(' '.join(list(map(str, i))))
                        return
        print(0)

n = int(input())
for i in range(n):
        data = list(map(int, input().split()))
        coords = [data[i: i + 2] for i in range(0, 7, 2)]
        check(coords)