using System;
using System.Numerics;
using System.Collections.Generic;
using System.Linq;
using System.IO;


namespace BOunce
{
    class Program
    {
        static void Main(string[] args)
        {
            //initialize
            int[] input = Console.ReadLine().Split(" ").Select(int.Parse).ToArray();
            int rows = input[0];
            int cols = input[1];

            int[,] matrix = new int[rows, cols];

            //fill matrix

            for (int row = 0; row < rows; row++)
            {
                for (int col = 0; col < cols; col++)
                {
                    matrix[row, col] = (int)Math.Pow(2, (col + row));
                }

            }

            //sum numbers in matrix & bounce
            int dirX = 1;
            int dirY = 1;
            int x = 1;
            int y = 1;
            int sum = 1;

            if (rows == 1 || cols == 1)
            {
                Console.WriteLine(1);

            }

            else
            {
                while (true)
                {

                    sum += matrix[x, y];

                    if ((x == rows - 1) && (y == cols - 1)) break;
                    else if ((x == 0) && (y == 0)) break;
                    else if ((x == rows - 1) && (y == 0)) break;
                    else if ((x == 0) && (y == cols - 1)) break;

                    if (x == 0 || x == (rows - 1))
                    {
                        dirX *= -1;
                    }
                    else if (y == 0 || y == (cols - 1))
                    {
                        dirY *= -1;
                    }

                    x += dirX;
                    y += dirY;
                }
                Console.WriteLine(sum);

            }


              //print matrix
              for (int row = 0; row < rows; row++)
          {

              for (int col = 0; col < cols; col++)
              {
                  Console.Write(matrix[row, col] + " ");
              }


              Console.WriteLine();
          }



        }
    }
}