#include <iostream>
#include <vector>
#include <string>
#include <cstring>
#include <math.h>
#include <cmath>
#include <limits.h>
#include <map>
#include <set>
#include <queue>
#include <algorithm>
#include <functional>
#include <stdio.h>
using namespace std;

long long MOD = 1000000007;

int main() {
    
    string S;
    cin >> S;
    
    int x = 0;
    int y = 0;
    for ( int i = 0; i < S.length(); i++ ) {
        if ( S[i] == 'N' ) { x++; }
        if ( S[i] == 'S' ) { x--; }
        if ( S[i] == 'E' ) { y++; }
        if ( S[i] == 'W' ) { y--; }
    }
    x = abs(x);
    y = abs(y);
    
    printf( "%f", sqrt( x*x + y*y ) );
    
    return 0;
}