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
    _ = ii()
    s = input()
    if String.contains?(s, "404") do
      IO.puts "Found"
    else
      IO.puts "NotFound"
    end
  end
end