#==================================================
def solve():
    A,B,C=map(int,input().split())
    X,Y,Z,W=map(int,input().split())

    def earning(x,y,z,w):
        return x*X+y*Y+z*Z+w*W

    def valid(x,y,z,w):
        return (x>=0) and (y>=0) and (z>=0) and (w>=0)

    def calc_A(a,b,c):
        x=0
        y=-a+c
        z=-b+c
        w=a+b-c
        return earning(x,y,z,w) if valid(x,y,z,w) else -1

    def calc_B(a,b,c):
        x=a-c
        y=0
        z=a-b
        w=-a+b+c
        return earning(x,y,z,w) if valid(x,y,z,w) else -1

    def calc_C(a,b,c):
        x=b-c
        y=-a+b
        z=0
        w=a-b+c
        return earning(x,y,z,w) if valid(x,y,z,w) else -1

    def calc_D(a,b,c):
        if (a+b+c)%2!=0:
            return -1

        x=(a+b-c)//2
        y=(-a+b+c)//2
        z=(a-b+c)//2
        w=0
        return earning(x,y,z,w) if valid(x,y,z,w) else -1

    def calc_E(a,b,c):
        if (a+b+c)%2!=1:
            return -1

        x=(a+b-c-1)//2
        y=(-a+b+c-1)//2
        z=(a-b+c-1)//2
        w=1
        return earning(x,y,z,w) if valid(x,y,z,w) else -1

    def calc(a,b,c):
        return max(
            calc_A(a,b,c),
            calc_B(a,b,c),
            calc_C(a,b,c),
            calc_D(a,b,c),
            calc_E(a,b,c))

    ans=0
    # (p) イチゴ味を k 食
    for k in range(A+1):
        ans=max(ans, calc(k,B,C))

    # (q) メロン味を k 食
    for k in range(B+1):
        ans=max(ans, calc(A,k,C))

    # (r) ブルーハワイ味を k 食
    for k in range(C+1):
        ans=max(ans, calc(A,B,k))

    return ans

#==================================================
T=int(input())
print(*[solve() for t in range(T)], sep="\n")