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
    [a1, _b1, a2, _b2, a3, _b3] = li()
    x = rem(a1, 2) + rem(a2, 2) + rem(a3, 2)
    IO.puts if rem(x, 2) == 0, do: ":-)", else: ":-("
  end
end