#include <bits/stdc++.h>
using namespace std;

#define SZ(a) (int)a.size()
#define ALL(a) a.begin(), a.end()
#define FOR(i, a, b) for (int i = (a); i<(b); ++i)
#define RFOR(i, b, a) for (int i = (b)-1; i>=(a); --i)
#define MP make_pair
#define PB push_back
#define F first
#define S second
#define FILL(a, b) memset(a, b, sizeof(a))

typedef long long LL;
typedef pair<int, int> PII;
typedef vector<int> VI;

typedef long double db;

map<char, int> dir = {{'N', 0}, {'E', 90}, {'S', 180}, {'W', 270}};

db getAngle(string s) {
	if (SZ(s) == 1) {
		return dir[s[0]];
	}
	vector<char> chars(ALL(s));
	sort(ALL(chars));
	chars.resize(unique(ALL(chars)) - chars.begin());
	char smaller, bigger;
	smaller = chars[0];
	bigger = chars[1];
	if (dir[bigger] < dir[smaller]) {
		swap(smaller, bigger);
	}
	if (smaller == 'N' && bigger == 'W') {
		swap(smaller, bigger);
	}
	db res;
	if (smaller == 'N' && bigger == 'E') {
		res = 45;
	}
	else if (smaller == 'E' && bigger == 'S') {
		res = 135;
	}
	else if (smaller == 'S' && bigger == 'W') {
		res = 225;
	}
	else {
		assert(smaller == 'W' && bigger == 'N');
		res = 315;
	}
	db pw = 22.5;
	RFOR(i, SZ(s) - 2, 0) {
		if (s[i] == smaller) {
			res -= pw;
		}
		else {
			res += pw;
		}
		pw /= 2;
	}
	return res;
}

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);	
	cout << fixed << setprecision(10);
	string s, t;
	cin >> s >> t;
	db a = getAngle(s), b = getAngle(t), d = abs(a - b);
	cerr << a << " " << b << endl;
	cout << min(d, 360 - d) << "\n";
	return 0;
}