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
    [a, b] = li()

    case {a, b} do
      {a, a} -> "Yes"
      {2, 4} -> "Yes"
      {4, 2} -> "Yes"
      _-> "No"
    end
    |> IO.puts
  end
end