#include <iostream>
using namespace std;

string p = "ESWN";

int main()
{
    char a, b;
    cin >> a >> b;
    int ans = 0;
    for(int i = 0; i < 4; i++){
        if(a == p[i]) ans -= i;
        if(b == p[i]) ans += i;
    }
    ans = (ans + 4) % 4;
    cout << ans << endl;
}