#include<iostream>
#include<set>
#include<algorithm>
#include<vector>
#include<string>
#include<set>
#include<map>
#include<numeric>
#include<queue>
#include<cmath>
#include <unordered_set>
using namespace std;
typedef long long ll;
const ll INF=1LL<<60;
typedef pair<int,int> P;
typedef pair<int,P> PP;
const ll MOD=998244353;
int main(){
    int H,W;
    cin>>H>>W;

    vector<vector<int>> ans(H,vector<int>(W,0));

    int c1=0,c2=0;

    for(int i=0;i<H;i++){
        for(int j=0;j<W;j++){
            if((i+j)%2==0){
                c1++;
                ans[i][j]=c1;
            }else{
                c2++;
                ans[i][j]=H*W+1-c2;
            }
        }
    }
    
    cout<<"Yes"<<endl;
    for(int i=0;i<H;i++){
        for(int j=0;j<W;j++){
            cout<<ans[i][j]<<(j==W-1?'\n':' ');
        }   
    }


}