#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) {
	bool ne = true;
	for (char c : s) {
		ne &= c == 'N' || c == 'E';
	}
	db res = 0;
	RFOR(i, SZ(s), 0) {
		db cur = s[i] == 'N' && !ne ? 360 : dir[s[i]];
		if (i == SZ(s) - 1) {
			res = cur;
		}
		else {
			res = (res + cur) / 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;
}