#include <iostream>
using namespace std;
int main(void){
    char a, b;
    cin >> a >> b;
    string s = "NESW";
    int n, w;
    for (int i = 0; i < 4; i++) {
        if (s[i] == a) n = i + 1;
        if (s[i] == b) w = i + 1;
    }
    int ans = w - n;
    if (ans < 0) ans += 4;
    cout << ans << endl;
}