#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;


string ALP = "ENWS";

double angle(string s){
	if(SZ(s) == 1){
		FOR(i, 0, 4)
			if(ALP[i] == s[0])
				return 90 * i;
		assert(0);
		return 0;
	}
	int p1 = -1, p2 = -1;
	FOR(i, 0, SZ(s)){
		int cur = -1;
		FOR(j, 0, 4)
			if(s[i] == ALP[j])
				cur = j;
				
		if(p1 == -1){
			p1 = cur;
			continue;
		}
		if(p1 == cur)
			continue;
		p2 = cur;
	}
	if(p1 > p2)
		swap(p1, p2);
	double l = 90 * p1, r = 90 * p2;
	
	
	if(p1 == 0 && p2 == 3){
		swap(p1, p2);
		l = 270;
		r = 360;
	}
	//cout << p1 << " " << p2 << " " << l << " " << r << endl;
	
	RFOR(i, SZ(s) - 2, 0){
		int cur = -1;
		FOR(j, 0, 4)
			if(s[i] == ALP[j])
				cur = j;
				
				
		double m = (l + r) / 2.;
		if(cur == p2)
			l = m;
		else
			r = m;
	}
	//cout << l << " " << r << endl;
	return (l + r) / 2;
}

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	string s0, s1;
	cin >> s0 >> s1;
	double a = angle(s0);
	//cout << a << endl;
	
	double b = angle(s1);
	
	if(a > b)
		swap(a, b);
	cout << fixed << setprecision(8);
	cout << min(b - a, a + 360 - b) << endl;


	
	
	
	return 0;
}