defmodule Main do

    def can_pair_txt(a, b) when a < b, do: "YES"
    def can_pair_txt(_, _), do: "NO"

    def remain_num(a, b), do: abs((a + 1) - b)

    def main do
        [a, b] = IO.gets("") |> String.trim |> String.split |> Enum.map(&String.to_integer/1)
        IO.puts can_pair_txt(a, b)
        IO.puts remain_num(a, b)
    end
end