#include <iostream>
#include <cmath>
using namespace std;
#define rep(i,n) for(int i = 0; i < (n); i++)

int main(){
    string s; cin >> s;
    int x = 0; int y = 0;
    int n; n = s.size();
    rep(i,n){
        if(s[i]=='N'){ y+=1; }
        else if(s[i]=='W'){ x+=1; }
        else if(s[i]=='E'){ x-=1; }
        else if(s[i]=='S'){ y-=1; }
    }
    cout << sqrt(pow(abs(x),2) + pow(abs(y),2)) << endl;
    return 0;
}