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

int main()
{
	char A, B;
	cin >> A >> B;

	string s = "ESWN";
	int a, b;
	for( int i = 0; i < 4; i++ ) {
		if( s[i] == A ) a = i;
		if( s[i] == B ) b = i;
	}
	int ans = b - a;
	if( ans < 0 ) ans += 4;

	cout << ans << endl;
}