#include <stdio.h>

int main () {
  int h = 0;
  int w = 0;
  
  int res = 0;
  
  int t = 0;
  int ans[1000][1000] = {};
  
  res = scanf("%d", &h);
  res = scanf("%d", &w);
  
  if (h%2 == 1 && w%2 == 0) {
    int tmp = h;
    h = w;
    w = tmp;
    t = 1;
  }
  
  for (int i = 0; i < h/2; i++) {
    for (int j = 0; j < w; j++) {
      ans[i*2+j%2][j] = i*w+j+1;
      ans[i*2+1-j%2][j] = h*w-i*w-j;
    }
  }
  
  if (h%2 == 1) {
    for (int j = 0; j < w; j += 2) {
      ans[h-1][j] = w*(h/2)+j+1;
    }
    for (int j = 1; j < w; j += 2) {
      ans[h-1][j] = h*w-w*(h/2)-j;
    }
  }
  
  printf("Yes\n");
  if (t > 0) {
    for (int i = 0; i < w; i++) {
      printf("%d", ans[0][i]);
      for (int j = 1; j < h; j++) {
        printf(" %d", ans[j][i]);
      }
      printf("\n");
    }
  } else {
    for (int i = 0; i < h; i++) {
      printf("%d", ans[i][0]);
      for (int j = 1; j < w; j++) {
        printf(" %d", ans[i][j]);
      }
      printf("\n");
    }
  }
  
  return 0;
}