#include <iostream>
#include <cmath>
using namespace std;

int main() {
    int x = 0, y = 0, idx=0;
    string s; cin >> s;

    while (s[idx]){
        switch(s[idx]){
            case 'N': y++; break;
            case 'S': y--; break;
            case 'W': x++; break;
            case 'E': x-- ;break;
            default:break;
        }
        idx++;
    }
    cout << sqrt(pow(x, 2) + pow(y, 2)) << endl;

    return 0;
}