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


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

    unordered_map<char, int> mp = {};
    mp['N'] = 0, mp['E'] = 1, mp['S'] = 2, mp['W'] = 3;
    int ans = (mp[b] - mp[a] + 4) % 4;
    cout << ans << endl;
}