using System;

namespace P01.Fill_the_matrix
{
    class Program
    {
        static void Main(string[] args)
        {
            int number = int.Parse(Console.ReadLine());
            string letter = Console.ReadLine();
            int[,] matrix = new int[number, number];

            if (letter=="a")
            {
                int digit = 1;
                for (int r = 0; r < matrix.GetLength(0); r++)
                    {
                        matrix[r, 0] = digit;
                    digit++;
                    }
                for (int r = 0; r < matrix.GetLength(0); r++)
                {
                    for (int c = 1; c < matrix.GetLength(1); c++)
                    {
                        matrix[r, c] = matrix[r, c - 1] + 4;
                    }
                }
            }
            else if (letter=="b")
            {
                int digit = 1;
                for (int c = 0; c < matrix.GetLength(1); c++)
                {

                    if (c%2==0)
                    {
                        for (int r = 0; r < matrix.GetLength(0); r++)
                        {
                            matrix[r, c] = digit;
                            digit++;
                        }
                    }
                    else
                    {
                        for (int r = matrix.GetLength(0)-1; r >=0; r--)
                        {
                            matrix[r, c] = digit;
                            digit++;
                        }
                    }

                }
            }
            else if (letter=="c")
            {

                int row=number-1;
                int col=0;
                int index = 1;
                int startRowDiagonal=col;
                int startColDiagonal=row;

                while (index<=matrix.Length)
                {

                    matrix[row, col] = index;
                    if (col==0)
                    {
                        startRowDiagonal = row;
                        startColDiagonal = 0;
                    }
                   else if (row==0)
                    {
                        startColDiagonal = col;
                        startRowDiagonal = 0;
                    }
                    row++;
                    col++;
                    index++;
                    if (col > number - 1)
                    {
                        row = 0;
                        col = startColDiagonal + 1;
                    }
                    else if (row>number-1)
                    {
                        row = startRowDiagonal-1;
                        col = 0;
                    }

                }



            }
            else if (letter == "d")
            {
                //string[] directions = { "down", "right", "up", "left" };
                int row = 0;
                int col = 0;
                int index = 1;
                int nextRow = row;
                int nextCol = col;
                string direction = "down";
                string nextDirection = String.Empty;
                while (index<=matrix.Length)
                {
                     row = nextRow;
                     col = nextCol;
                    matrix[row, col] = index;
                    index++;
                    if (direction=="down")
                    {
                        nextRow++;
                        nextDirection = "right";
                    }
                    else if (direction=="right")
                    {
                        nextCol++;
                        nextDirection = "up";
                    }
                    else if (direction=="up")
                    {
                        nextRow--;
                        nextDirection = "left";
                    }
                    else if (direction=="left")
                    {
                        nextCol--;
                        nextDirection = "down";
                    }

                    if (nextRow>number-1  || nextRow<0 || nextCol>number-1 || nextCol< 0  || matrix[nextRow, nextCol] != 0)
                    {
                        direction = nextDirection;
                        if (direction == "down")
                        {
                            nextRow++;
                            nextCol++;
                            nextDirection = "right";
                        }
                        else if (direction == "right")
                        {
                            nextCol++;
                            nextRow--;
                            nextDirection = "up";
                        }
                        else if (direction == "up")
                        {
                            nextRow--;
                            nextCol--;
                            nextDirection = "left";
                        }
                        else if (direction == "left")
                        {
                            nextCol--;
                            nextRow++;
                            nextDirection = "down";
                        }
                    }
                }
            }



            for (int r = 0; r < matrix.GetLength(0); r++)
            {
                for (int c = 0; c < matrix.GetLength(1); c++)
                {
                    Console.Write($"{matrix[r, c]} ");
                }
                Console.WriteLine();
            }
        }
    }
}