t = gets.to_i
t.times do
  a, b, c, x, y, z = gets.split.map &:to_i

  d = [[0, 2, 1], [1, 0, 2], [1, 2, 0], [2, 0, 1]].map { |r|
    ps = (0...3).map { |i| r.find_index { |v| v == i } }
    vs = (0...3).map { |i| [a, b, c][ps[i]] }
    cs = (0...3).map { |i| [y, z, x][ps[i]] }
    s, t, u, v = *vs, 0
    if t <= s
      q = s + 1 - t
      v += q * cs[1]
      s -= q
      u -= q
    end
    if u <= t
      q = t + 1 - u
      v += q * cs[2]
      s -= q
      t -= q
    end
    next Float::INFINITY if [s, t, u].any? { |q| q < 1 }
    v
  } .min

  d = -1 if d == Float::INFINITY
  puts d
end