#include <algorithm>
#include <cmath>
#include <cstdio>
#include <iostream>
#include <map>
#include <set>
#include <string>
#include <vector>
#define rep(i, n) for (int i = 0; i < n; ++i)
#define FOR(i, a, b) for (int i = a; i < b; ++i)
#define ll long long
#define ull unsigned long long
#define pb(x) push_back(x)
using namespace std;

int main() {
  string s;
  cin >> s;
  int x = 0, y = 0;
  rep(i, s.size()) {
    switch (s[i]) {
      case 'N': y++; break;
      case 'E': x++; break;
      case 'S': y--; break;
      case 'W': x--; break;
    }
  }
  double res = sqrt(x * x + y * y);
  printf("%.2f\n", res);
  return 0;
}