#include <iostream>
#include <map>
using namespace std;

int main(void) {
	string a;	cin >> a;
	string b;	cin >> b;

	map<string, int> mp;
	mp["N"] = 0;	mp["E"] = 1;	mp["S"] = 2;	mp["W"] = 3;

	int ans = (mp[b] - mp[a] + 4) % 4;

	cout << ans << endl;
}