#include <bits/stdc++.h>

using namespace std;

char next(char a) {
	if (a == 'N') {
		return 'E';
	}
	if (a == 'E') {
		return 'S';
	}
	if (a == 'S') {
		return 'W';
	}

	return 'N';
}

int main() {
	char a, b;
	cin >> a >> b;

	int ans = 0;
	while(a != b) {
		a = next(a);
		ans++;
	}

	cout << ans << endl;

	return 0;
}