#include<iostream>
#include<iomanip>
#include<cmath>
#include<string>
#include<algorithm>
#include<vector>
#include<math.h>
#include<stack>
using namespace std;
int main(void){
    string S; cin >> S;
    int H = 0, W = 0;
    for(int i = 0; i < S.size(); i++){
        if(S[i] == 'N') H += 1;
        if(S[i] == 'S') H -= 1;
        if(S[i] == 'W') W -= 1;
        if(S[i] == 'E') W += 1;
    }
    cout << fixed << pow(H * H + W * W, 1.0 / 2.0) << endl;
    return 0;
}