#include <bits/stdc++.h>

using namespace std;
void fast_io() {
    ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
}

int main() {
    fast_io();
    char a, b;
    cin >> a >> b;
    map<char, int> d;
    d['E'] = 0;
    d['S'] = 1;
    d['W'] = 2;
    d['N'] = 3;
    cout << (d[b] - d[a] + 4) % 4 << endl;
}