#include <stdio.h>

int main()
{
	int H, W;
	scanf("%d %d", &H, &W);
	printf("Yes\n");
	
	int i, j, k, ans[1001][1001];
	for (i = 1, k = 1; i <= H; i++) for (j = 2 - i % 2; j <= W; j += 2) ans[i][j] = k++;
	for (i = 1, k = H * W; i <= H; i++) for (j = i % 2 + 1; j <= W; j += 2) ans[i][j] = k--;
	for (i = 1; i <= H; i++) {
		for (j = 1; j <= W; j++) printf("%d ", ans[i][j]);
		printf("\n");
	}
	fflush(stdout);
	return 0;
}