#include <bits/stdc++.h>
using namespace std;
int main() {
  char A, B;
  cin >> A >> B;
  char C = A;
  map<char, char> mp;
  mp['E'] = 'S';
  mp['S'] = 'W';
  mp['W'] = 'N';
  mp['N'] = 'E';
  int ans = 0;
  while (C != B) {
    C = mp[C];
    ans++;
  }
  cout << ans << endl;
  return 0;
}