defmodule Main do
  def input, do: IO.read(:line) |> String.trim
  def ii, do: input() |> String.to_integer
  def li, do: input() |> String.split |> Enum.map(&String.to_integer/1)
  def yn(b), do: IO.puts(if b, do: "Yes", else: "No")

  def main do
    t = ii()
    for _ <- 1..t do
      [a, b, c, x, y, z] = li()
      case kadomatu(a, b, c) do
        [] -> -1
        res ->
          res
          |> Enum.map(fn {a1, b1, c1} -> x*(a-a1) + y*(b-b1) + z*(c-c1) end)
          |> Enum.min
      end
      |> IO.puts
    end
  end

  def kadomatu(a, b, c) do
    for {a, b, c} <- [{b, a, c}, {b, c, a}, {a, c, b}, {c, a, b}] do
      f(a, b, c)
    end
    |> List.flatten
    |> Enum.uniq
    |> Enum.filter(fn {x, y, z} -> a >= x and b >= y and c >= z end)
  end

  def f(1, _, _), do: []
  def f(_, 1, _), do: []
  def f(a, b, c) do
    cond do
      a <= b ->
        x = b - a + 1
        f(a, b-x, c)
      b <= c ->
        x = c - b + 1
        f(a, b, c-x)
      true ->
        [{a, c, b}, {b, c, a}, {b, a, c}, {c, a, b}]
    end
  end
end