#include <bits/stdc++.h>

using std::cin;
using std::cout;
using std::map;

int main() {
	map<char, int> mp;
	mp['W'] = 0;
	mp['N'] = 1;
	mp['E'] = 2;
	mp['S'] = 3;
	
	char a, b;
	cin >> a >> b;
	
	cout << (mp[b] - mp[a] + 4) % 4 << '\n';
	
	return 0;
}