using System;
using System.IO;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Numerics;
using System.Diagnostics;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using static System.Math;

class P
{
   static void Main()
   {
       int h = 0;
       int w = 0;
       foreach (var item in Console.ReadLine())
       {
           switch (item)
           {
               case 'N':
                   h++;
                   break;
               case 'E':
                   w++;
                   break;
               case 'W':
                   w--;
                   break;
               case 'S':
                   h--;
                   break;
           }
       }
       Console.WriteLine(Sqrt(h * h + w * w));
   }
}