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

int main() {
    string s;
    cin >> s;
    int x= 0,y=0;
    for(int i = 0;;i++){
        if(!s[i])break;
        if(s[i] == 'E')x++;
        else if(s[i] == 'W')x--;
        else if(s[i] == 'N')y++;
        else if(s[i] == 'S')y--;
    }
    double ans;
    ans = x*x + y*y;
    ans = sqrt(ans);
    cout << ans << endl;
    return 0;
}