#include<iostream>

int rot(char x) {
  if(x == 'E') return 0; 
  if(x == 'W') return 2; 
  if(x == 'N') return 1; 
  return 3;
}

int main() {
  int x, y;
  char ch;
  std::cin >> ch;
  x = rot(ch);
  std::cin >> ch;
  y = rot(ch);
  std::cout << ((x - y) % 4 + 4) % 4 << '\n';
}