#include<bits/stdc++.h>
using namespace std;

int main(){
  char A,B;
  cin >> A >> B;
  int a,b;
  if(A == 'N') a = 0;
  else if(A == 'E') a = 1;
  else if(A == 'S') a = 2;
  else a = 3;
  if(B == 'N') b = 0;
  else if(B == 'E') b = 1;
  else if(B == 'S') b = 2;
  else b = 3;
  int ans = 4+b-a;
  ans %= 4;
  cout << ans << endl;
}