#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef pair<ll,ll> P;
typedef vector<ll> VI;
typedef vector<VI> VVI;
#define REP(i,n) for(int i=0;i<(n);i++)
#define ALL(v) v.begin(),v.end()
template<typename T> bool chmax(T &x, const T &y) {return (x<y)?(x=y,true):false;};
template<typename T> bool chmin(T &x, const T &y) {return (x>y)?(x=y,true):false;};
constexpr ll MOD=998244353;
constexpr ll INF=2e18;

int main(){
    int h, w; cin >> h >> w;
    VVI ans(h+1,VI(w));
    int l=1, r=h*w;
    REP(i,(h+1)/2){
        REP(j,w){
            int x=j%2==1;
            int y=j%2==0;
            ans[i*2+x][j]=l++;
            ans[i*2+y][j]=r--;
        }
    }
    cout << "Yes" << endl;
    REP(i,h)REP(j,w) cout << ans[i][j] << " \n"[j==w-1];
    return 0;
}