using System;
using System.Collections.Generic;
using System.Linq;

namespace Test
{
    class Program
    {
        static void Main(string[] args)
        {
            string s = Console.ReadLine();
            int tate = 0; int yoko = 0;
            for (int i = 0; i < s.Length; i++)
            {
                switch (s[i])
                {
                    case ('N'):
                    {
                        tate++;
                        break;
                    }
                    case ('E'):
                    {
                        yoko++;
                        break;
                    }
                    case ('S'):
                    {
                        tate--;
                        break;
                    }
                    case ('W'):
                    {
                        yoko--;
                        break;
                    }
                }
            }
            double ret = Math.Abs(tate) * Math.Abs(tate);
            ret += Math.Abs(yoko) * Math.Abs(yoko);
            Console.WriteLine(Math.Sqrt(ret));
        }
    }
}