#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vll=vector<long long>;
template<typename T>
T get(){T r;cin>>r;return r;}

int main() {
    string s=get<string>();
    ll x=0,y=0;
    for(ll i=0;i!=s.size();i++){
        if(s[i]=='N'){
            y++;
        }else if(s[i]=='S'){
            y--;
        }else if(s[i]=='E'){
            x++;
        }else{
            x--;
        }
    }
    cout<<pow(pow(x,2)+pow(y,2),0.5)<<endl;

    system("pause");
}