// ジャッジコードチェックその３
#include<bits/stdc++.h>
using namespace std;

#define UNTIE ios_base::sync_with_stdio( false ); cin.tie( nullptr ) 
#define CIN( LL , A ) LL A; cin >> A 
#define QUIT return 0 

int main()
{
  UNTIE;
  constexpr const int bound = 1000;
  CIN( int , H );
  assert( 2 <= H && H <= bound );
  CIN( int , W );
  assert( 2 <= W && W <= bound );
  int minmax[2] = { 1 , H * W };
  constexpr const int incrdecr[2] = { 1 , -1 };
  int A[bound][bound];
  int h = 0;
  int w = 0;
  int index;
  bool transpose = W % 2 == 0 && H % 2 == 1; 
  if( transpose ){
    swap( H , W );
  }
  while( h + 1 < H ){
    w = 0;
    index = 0;
    int ( &Ah )[bound] = A[h];
    int ( &Ah_plus )[bound] = A[h+1];
    while( w < W ){
      Ah[w] = minmax[index];
      minmax[index] += incrdecr[index];
      index = 1 - index;
      Ah_plus[w] = minmax[index];
      minmax[index] += incrdecr[index];
      w++;
    }
    h += 2;
  }
  if( h + 1 == H ){
    w = 0;
    index = 0;
    int ( &Ah )[bound] = A[h];
    int W_minus = W - 1;
    int W_half = ( W + 1 ) / 2;
    while( w < W_half ){
      Ah[w] = minmax[index];
      minmax[index] += incrdecr[index];
      index = 1 - index;
      Ah[W_minus - w] = minmax[index];
      minmax[index] += incrdecr[index];
      w++;
    }
  }
  cout << "Yes\n";
  h = 0;
  if( transpose ){
    swap( H , W );
    while( h < H ){
      w = 0;
      while( w < W ){
	cout << A[w][h] << "\n";
	w++;
      }
      h++;
    }
  } else {
    while( h < H ){
      int ( &Ah )[bound] = A[h];
	w = 0;
      while( w < W ){
	cout << Ah[w] << "\n";
	w++;
      }
      h++;
    }
  }
  QUIT;
}