#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<ll,ll>;
#define rep(i, n) for(int i = 0; i < n; i++)
#define all(x) (x).begin(),(x).end()
template<class T>bool chmin(T&a, const T&b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool chmax(T&a, const T&b){if(a<b){a=b;return 1;}return 0;}

int main(){
    string s = "NESW";
    char a,b;
    cin >> a >> b;
    int p,q;
    rep(i,4){
        if(a==s[i]) p = i;
    }
    rep(i,4){
        if(b==s[i]) q = i;
    }
    cout << (q+4-p)%4 << endl;
    return 0;
}