import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

# 1つに +1 すると考えてあげればよい。作ってみてマイナスになってたらダメ

T = int(readline())
m = map(int,read().split())
ABCXYZ = zip(m,m,m,m,m,m)

INF = 10 ** 30

def type_231(A,B,C,X,Y,Z):
    a = C + 1
    if a <= A:
        a = A
    b = a + 1
    if b <= B:
        b = B
    x = a - A # 0,-1,-1
    y = b - B # -1,0,-1
    if any((A - y <= 0, B - x <= 0, C - x - y <= 0)):
        return INF
    return x * X + y * Y

def type_213(A,B,C,X,Y,Z):
    a = B + 1
    if a <= A:
        a = A
    c = a + 1
    if c <= C:
        c = C
    x = a - A # 0,-1,-1
    z = c - C # -1,-1,0
    if any((A - z <= 0, B - x - z <= 0, C - x <= 0)):
        return INF
    return x * X + z * Z

def solve(A,B,C,X,Y,Z):
    X,Y,Z = Y,Z,X
    x = min(
        type_231(A,B,C,X,Y,Z), type_231(C,B,A,Z,Y,X),
        type_213(A,B,C,X,Y,Z), type_213(C,B,A,Z,Y,X))
    return x if x < INF else -1

answer = [solve(*args) for args in ABCXYZ]
print('\n'.join(map(str,answer)))