#include <bits/stdc++.h> 

using namespace std;
using ll=long long;
using ull=unsigned long long;
using pii=pair<int,int>;

#define INF LONG_MAX
#define MOD1 1000000007
#define MOD2 998244353
#define MOD MOD1
#define rng(a) a.begin(),a.end()
#define rrng(a) a.end(),a.begin()
#define endl "\n"

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);

    map<char,int>m;
    m['E']=0;
    m['S']=1;
    m['W']=2;
    m['N']=3;
    char A,B;
    cin>>A>>B;
    cout<<(m[B]-m[A]+4)%4<<endl;
    return 0;
}