#include <stdio.h>
#include <stdlib.h>

int abs( int x ) {
	return x >= 0 ? x : -x;
}

int cm( int x1, int y1, int x2, int y2 ) {
	return x1 == x2 || y1 == y2 || y1-abs(5-x1) == y2-abs(5-x2);
}

int main() {
	char src[4], dst[4];
	scanf( "%s %s", src, dst );
	int a = src[0]-'a', b = 11-atoi(src+1);
	int e = dst[0]-'a', f = 11-atoi(dst+1);
	int num = 0;
	for( int c = 0; c < 11; ++c )
		for( int d = 0; d < 11; ++ d )
			if( c+d >= 5 && c-d <= 5 )
				if( ( c != a || d != b ) && ( c != e || d != f ) )
					num += cm(a,b,c,d) && cm(c,d,e,f);
	printf( "%d\n", num );
}