class Program
{
    static void Main(string[] args)
    {
        string direction = Console.ReadLine()!;
        double xCount = 0;
        double yCount = 0;

        foreach (char c in direction)
        {
            if (c == 'N')
            {
                yCount++;
            }
            else if (c == 'E')
            {
                xCount++;
            }
            else if (c == 'W')
            {
                xCount--;
            }
            else
            {
                yCount--;
            }
        }

        if (xCount < 0)
        {
            xCount *= -1;
        }
        else if (yCount < 0)
        {
            yCount *= -1;
        }

        double ans = xCount * xCount + yCount * yCount;
        ans = Math.Sqrt(ans);

        Console.WriteLine(ans);
    }
}