using System;

namespace No113_1{
    public class Program{
        public static void Main(string[] args){
            var v = 0;
            var h = 0;
            foreach(var c in Console.ReadLine()){
                switch(c){
                    case 'N': v++; break;
                    case 'E': h--; break;
                    case 'W': h++; break;
                    case 'S': v--; break;
                } 
            }
            Console.WriteLine(Math.Sqrt(v * v + h * h));
        }
    }
}