defmodule Main do
  def main do
    IO.read(:line)
    |> String.trim()
    |> String.to_charlist()
    |> solve
    |> IO.puts()
  end

  def solve(s) do
    solve_rec(s, 0, 0)
  end

  def solve_rec([], x, y) do
    :math.sqrt(x * x + y * y)
  end

  def solve_rec([c | t], x, y) do
    case c do
      ?N -> solve_rec(t, x, y + 1)
      ?E -> solve_rec(t, x + 1, y)
      ?W -> solve_rec(t, x - 1, y)
      ?S -> solve_rec(t, x, y - 1)
    end
  end
end