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

int main(){
  char A, B;
  cin >> A >> B;
  
  string s = "NWSE";
  int i, j;
  for(int k = 0; k < 4; k++){
    if(A == s[k]) i = k;
    if(B == s[k]) j = k;
  }
  
  int ans = j - i;
  if(ans < 0) ans += 4;
  cout << ans;
}