#include <bits/stdc++.h>
using ll = long long;
using llu = long long unsigned;

using namespace std;

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

    map<char, int> data;
    data['E'] = 0;
    data['S'] = 1;
    data['W'] = 2;
    data['N'] = 3;

    int result = data[B] - data[A] + 4;
    result %= 4;
    cout << result << endl; return 0;
}