defmodule Main do
  def main do
    1..(IO.read(:line) |> String.trim() |> String.to_integer())
    |> Enum.map(fn _ ->
      IO.read(:line) |> String.split() |> Enum.map(&String.to_integer/1)
    end)
    |> solve
    |> IO.puts()
  end

  def solve(a) do
    a
    |> Enum.sort(fn [a, b], [c, d] -> c / d <= a / b end)
    |> Enum.map(&Enum.join(&1, " "))
    |> Enum.join("\n")
  end
end