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

int main()
{
	vector<char> dir = {'E', 'S', 'W', 'N'};
	char a, b;
	cin >> a >> b;
	int an = 0;
	int bn = 0;
	for(int i = 0; i < 4; i++)
	{
		if(dir[i] == a) an = i;
		if(dir[i] == b) bn = i;
	}
	cout << (bn - an + 4) % 4 << endl;
	return 0;
}