#include <cstdio>
#include <iostream>


using namespace std;

bool can_reach(char scol, int srow, char tcol, int trow) {
    if(scol == tcol)
        return srow != trow;

    if(scol > 'f') {
        srow += scol - 'f';
    }
    if(tcol > 'f') {
        trow += tcol - 'f';
    }

    if(srow == trow)
        return true;

    if(srow - trow == ((int)scol) - ((int)tcol))
        return true;

    return false;
}

int main() {
    int srow, trow;
    char scol, tcol;
    scanf("%c%d %c%d", &scol, &srow, &tcol, &trow);

    int ct = 0;

    for(char col = 'a'; col < 'l'; col++) {
        for(int n = 1; n < 12; n++) {
            int height = 11 - abs(((int)col) - ((int)'f'));
            if(n > height)
                break;

            if(can_reach(scol, srow, col, n) && can_reach(col, n, tcol, trow))
                ct += 1;
        }
    }

    printf("%d\n", ct);

    return 0;
}