#include <stdio.h>

int main()
{
	char A[2], B[2];
	scanf("%s", A);
	scanf("%s", B);
	
	int a, b;
	if (A[0] == 'N') a = 0;
	else if (A[0] == 'E') a = 1;
	else if (A[0] == 'S') a = 2;
	else a = 3;
	if (B[0] == 'N') b = 0;
	else if (B[0] == 'E') b = 1;
	else if (B[0] == 'S') b = 2;
	else b = 3;
	printf("%d\n", (b + 4 - a) % 4);
	fflush(stdout);
	return 0;
}