#include <bits/stdc++.h>
#define INF 990000000
//1
using namespace std;


int main() {
string s;
cin>>s;
int yok=0,tat=0;
for(int i=0;i<(int )s.size();i++){
switch(s[i]){
case 'N':tat++;
break;
case 'E':yok++;
break;
case 'W':yok--;
break;
case 'S':tat--;
break;

}

}

double q=sqrt(abs(tat)*abs(tat)+abs(yok)*abs(yok));

cout <<q<<endl;

}