#include <bits/stdc++.h>

using namespace std;

int main(){
string s;
cin>>s;
int x=0,y=0;
for(int i=0;i<s.length();++i){
switch(s[i]){
case 'W':
x--;break;
case 'E':
x++;break;
case 'N':
y++;break;
case 'S':
y--;break;
}}
cout<<sqrt(x*x+y*y)<<endl;}