#include <bits/stdc++.h>
using namespace std;
int main() {
    int H, W;
    cin >> H >> W;
    int l = 1, r = H*W;
    cout << "Yes" << endl;
    for( int i = 0; i < H; i++ ) {
        for( int j = 0; j < W; j++ ) {
            if( (i+j)%2 == 0 ) {
                cout << l;
                l++;
            }else {
                cout << r;
                r--;
            }
            cout << ( j == W-1 ? '\n' : ' ' );
        }
    }
}