#include <iostream>
using namespace std;

int main() {
	char A, B; cin >> A >> B;
	int a, b;
	switch(A) {
		case 'N': a = 0;
		break;
		case 'E': a = 1;
		break;
		case 'S': a = 2;
		break;
		default: a = 3; 
	}
	switch(B) {
		case 'N': b = 4;
		break;
		case 'E': b = 5;
		break;
		case 'S': b = 6;
		break;
		default: b = 7; 
	}
	return ((b - a) % 4);
}