#include <bits/stdc++.h>
using namespace std;
int main() {
    unordered_map<char, int> mp{
        {'E', 0},
        {'S', 1},
        {'W', 2},
        {'N', 3},
    };
    char a, b;
    cin >> a >> b;
    cout << (mp[b] + 4 - mp[a]) % 4 << endl;
    return 0;
}