#include<bits/stdc++.h>
#define rep(i,n) for(int i=0; i< (n); i++)
using namespace std;
typedef long long ll;
typedef pair<int,int> P;
const int mod = 998244353;
const int inf = (1<<30);
const ll INF = (1ull<<62);

int f(char c){
    if(c == 'E') return 0;
    if(c == 'W') return 2;
    if(c == 'S') return 1;
    if(c == 'N') return 3;
    return 0;
}

int main(){
    int a,b;
    char c;
    cin>>c;
    a = f(c);
    cin>>c;
    b = f(c);
    cout<<(b+4-a)%4<<endl; 
}