#include <iostream>
#include <iomanip>

#include <algorithm>
#include <math.h>

#include <string>
/////////
#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i,n) REP(i,0,n)
#define P(p) cout<<(p)<<endl;
/////////
typedef long long LL;
typedef long double LD;
/////////
using namespace::std;
/////////

int main(void){
	cin.tie(0);
	ios::sync_with_stdio(false);
	cout << fixed;//
	//cout << setprecision(6);//

	string s;
	cin >> s;
	int x = 0;
	int y = 0;
	rep(i,s.size()){
		if(s[i] == 'N'){++y;}
		else if(s[i] == 'E'){++x;}
		else if(s[i] == 'W'){--x;}
		else if(s[i] == 'S'){--y;}
	}

	double ans = 0.0;
	ans = sqrt((x*x+y*y)*1.0);
	P(ans);
	return 0;
}