using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace foryuki
{
    class Program
    {
        static void Main(string[] args)
        {
            char[] S = Console.ReadLine().ToCharArray();
            int x = 0;
            int y = 0;

            foreach (var c in S)
            {
                switch (c)
                {
                    case 'E':
                        x += 1;
                        break;
                    case 'S':
                        y -= 1;
                        break;
                    case 'W':
                        x -= 1;
                        break;
                    case 'N':
                        y += 1;
                        break;
                }
            }

            double ans = Math.Sqrt(Math.Pow(x, 2) + Math.Pow(y, 2));

            Console.WriteLine(ans);
        }

        //-------------------------------------------------------------

        static int[] ConvertStringArrayToIntArray(string[] str, int defaultValue)
        {
            int[] b = Array.ConvertAll<string, int>(str, delegate(string value)
                {
                    return int.Parse(value);
                });

            for (int i = 0; i < b.Length; i++)
            {
                b[i] = defaultValue;
            }
            return b;
        }
    }
}