#include<stdio.h>
int main()
{
	char a[4], b[4];
	scanf("%s%s", a, b);
	int i, j;
	char c[8] = "NESW";
	for (i = 0; a[0] != c[i]; i++);
	for (j = 0; b[0] != c[j]; j++);
	printf("%d\n", (j - i + 4) % 4);
	return 0;
}