defmodule Main do
  def main do
    1..3
    |> Enum.map(fn _ -> IO.read(:line) |> String.trim() end)
    |> solve
    |> IO.puts()
  end

  def solve(s) do
    cond do
      2 * (s |> Enum.count(fn x -> x == "RED" end)) < s |> length -> "BLUE"
      true -> "RED"
    end
  end
end