def f(x0, y0, x1, y1, z0, z1):
    x = x0 + (x1-x0) * z0 * pow(z0-z1, -1, mod) % mod
    x %= mod
    y = y0 + (y1-y0) * z0 * pow(z0-z1, -1, mod) % mod
    y %= mod
    return x, y
mod = 998244353
for _ in range(int(input())):
    A = list(map(int, input().split()))
    B = list(map(int, input().split()))
    C = list(map(int, input().split()))
    L = list(map(int, input().split()))
    ax, ay = f(L[0], L[1], A[0], A[1], L[2], A[2])
    bx, by = f(L[0], L[1], B[0], B[1], L[2], B[2])
    cx, cy = f(L[0], L[1], C[0], C[1], L[2], C[2])
    ans0 = -((bx-ax) * (cy-ay) - (cx-ax) * (by-ay))
    ans0 %= mod
    ans0 = ans0 * pow(2, -1, mod) % mod
    print(ans0)