def construct_grid(H, W):
    grid = [[0 for _ in range(W)] for _ in range(H)]
    numbers = list(range(1, H*W +1))
    
    # 分割: 奇数インデックスと偶数インデックス
    odd_positions = []
    even_positions = []
    for i in range(H):
        for j in range(W):
            if (i + j) % 2 == 0:
                odd_positions.append((i, j))
            else:
                even_positions.append((i, j))
    
    # 奇数位置に後半の大きい数を、偶数位置に前半の小さい数を配置
    mid = len(numbers)//2
    for idx, (i,j) in enumerate(odd_positions):
        grid[i][j] = numbers[mid + idx]
    for idx, (i,j) in enumerate(even_positions):
        grid[i][j] = numbers[idx]
    
    return grid

# 入力の受け取り
H, W = map(int, input().split())

# グリッドの構築
grid = construct_grid(H, W)

# 出力
print("Yes")
for row in grid:
    print(' '.join(map(str, row)))