ssss["x:map(int,x.split())"m["s:(lambda a,b,c,d,e,f,g,h,i=[s[i/3+1][i%3]-s[0][i%3]for i in range(9)]:(a*e*i+b*f*g+c*d*h-a*h*f-b*i*d-c*g*e)/6)()"m0&