#include <iostream>
#include <vector>
#include <cmath>
#include <map>
#include <set>
#include <iomanip>
#include <queue>
#include <algorithm>
#include <numeric>
#include <deque>
#include <complex>
#include <cassert>

using namespace std;
using ll = long long;

int main(){

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

    return 0;
}