#include <iostream>
#include <string>
#include <vector>
#include <cmath>
#include <algorithm>
#include <cstdlib>
#include <ctime>
#include <cstdio>
#include <functional>
#include <set>
#include <cstring>

using namespace std;

int main()
{	
	string s;
	cin>>s;

	int x=0,y=0;
	for(int i=0;i<s.size();i++){
		if(s[i]=='N') y++;
		else if(s[i]=='S') y--;
		else if(s[i]=='E') x++;
		else if(s[i]=='W') x--;


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

	return 0;

}