#include <bits/stdc++.h>
using namespace std;
vector<char> D = {'N', 'E', 'S', 'W'};
int main(){
  char A;
  cin >> A;
  char B;
  cin >> B;
  int x;
  for (int i = 0; i < 4; i++){
    if (D[i] == A){
      x = i;
    }
  }
  int y;
  for (int i = 0; i < 4; i++){
    if (D[i] == B){
      y = i;
    }
  }
  cout << (y - x + 4) % 4 << endl;
}