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
    s = input()

    s
    |> String.graphemes
    |> Enum.chunk_every(3, 1, :discard)
    |> Enum.find_value(fn v ->
      case v do
        [x, x, x] -> x
        _ -> nil
      end
    end)
    |> then(fn v ->
      case v do
        "O" -> "East"
        "X" -> "West"
        nil -> "NA"
      end
    end)
    |> IO.puts
  end
end