R=range
J=lambda:list(map(int,input().split()))
p=998244353
def m(Q):return(Q[0][0]-Q[2][0])*(Q[1][1]-Q[2][1])-(Q[0][1]-Q[2][1])*(Q[1][0]-Q[2][0])
for t in R(sum(J())):P=[J()for i in R(4)];D,E=[[P[3][j]-P[3][2]*(P[i][j]-P[3][j])/(P[i][2]-P[3][2])for j in R(2)]for i in R(3)],[[P[3][j]-P[3][2]*(P[i][j]-P[3][j])*pow(P[i][2]-P[3][2],-1,p)for j in R(2)]for i in R(3)];print([1,-1][m(D)<1e-8]*m(E)*(p+1)//2%p)