#include<iostream>
#include<vector>
#include<algorithm>
#include<cstdio>
#include<cmath>
using namespace std;
int main(){
    string str;
    int x=0,y=0;
    cin >> str;
    for(int i=0;str[i]!='\0';i++){
        if(str[i]=='N') x++;
        else if(str[i]=='S')    x--;
        else if(str[i]=='E')    y++;
        else if(str[i]=='W')    y--;    
    }
    cout << sqrt(x*x+y*y);
    return 0;
}