defmodule Main do 
  def main do
    [a,b] = IO.stream(:stdio, :line) |> Enum.take(2) |> Enum.map(&String.trim/1) |> Enum.map(&String.codepoints/1) |> Enum.map(&Enum.sort/1)
    (a == b) |> out |> IO.puts
  end
  
  def out(true) do
    "YES"
  end
  
  def out(false) do
    "NO"
  end
end