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

int main() {
    map<char, int> table;
    table['N'] = 0;
    table['E'] = 1;
    table['S'] = 2;
    table['W'] = 3;

    char a, b;
    cin >> a;
    cin >> b;

    auto ans = (table[b] + 4 - table[a]) % 4;
    cout << ans << endl;
}