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

char str[105] = {};
int x, y;

int main() {
    int i = 0;
    cin >> str;
    while(str[i]) {
        if(str[i] == 'N') y++;
        else if(str[i] == 'E') x++;
        else if(str[i] == 'W') x--;
        else if(str[i] == 'S') y--;
        i++;
    }
    x = abs(x);
    y = abs(y);

    cout << sqrt(x * x + y * y) << endl;
    return 0;
}