#include <iostream>
#include <string>
#include <math.h>
#include <iomanip>
using namespace std;

int main(){
    string str;
    cin >> str;
    int y = 0;
    int x = 0;
    double ans;
    for(int d = 0; d < str.length(); d++){
        switch(str[d]){
            case 'N':
                 y++;
                 break;
            case 'W':
                 x--;
                 break;
            case 'E':
                 x++;
                 break;
            case 'S':
                 y--;
                 break;
        }
    }
 //   cout << "x:" << x << " y:" << y << "x^2+y^2:" << x*x+y*y << endl;
    ans = sqrt(x*x+y*y);
//    cout <<"test:" << 1000*sqrt(x*x+y*y) << endl;
    cout << fixed << ans << endl;

    return 0;
}