using System;
using System.Linq;

public class P0113 {
    public static void Main() {
        var s = Console.ReadLine();
        int x = 0;
        int y = 0;
        foreach(char c in s.ToCharArray()) {
            if(c == 'N') {
                y += 1;
            } else if (c == 'S') {
                y -= 1;
            } else if (c == 'E') {
                x += 1;
            } else {
                x -= 1;
            }
        }
        x = Math.Abs(x);
        y = Math.Abs(y);
        Console.WriteLine(Math.Pow(x*x + y*y, 0.5));
    }
}