/**
 *      Author:  Nicholas Winschel
 *      Created: 11.11.2024 21:18:48
**/

#include <bits/stdc++.h>
using namespace std;
using ll=long long;
using db=long double;
template<class T> using V=vector<T>;
using vi = V<int>;
using vl = V<ll>;
using pi = pair<int,int>;
#define f first
#define s second
#define sz(x) (int)((x).size())
#define each(a,b) for (auto &a : b)

db eval(string &s) {
  if (s.find('S') != s.npos) {
    for (char &c : s) if (c == 'S') {
      c = 'N';
    }
    return 360-eval(s);
  }
  if (s.find('W') != s.npos) {
    for (char &c : s) if (c == 'W') {
      c = 'E';
    }
    return 180-eval(s);
  }
  if (sz(s) == 1) {
    if (s[0] == 'N') return 90;
    if (s[0] == 'E') return 0;
  }
  db l = 90, r = 0;
  for (int i = s.size()-3; i >= 0; --i) {
    if (s[i] == 'N') r = (l+r)/2;
    else if (s[i] == 'E') l = (l+r)/2;
  }

  return (l + r)/2;
}

int main() {
  cin.tie(0)->sync_with_stdio(0); // initialize fast I/O

  string x, y; cin >> x >> y;
  string tmp = "NW";
  db ans = abs(eval(x)-eval(y));
  if (ans > 360-ans) ans = 360-ans;
  cout << fixed << setprecision(15) << ans << '\n';
  return 0;
}