import java.util.*;
import java.lang.*;
import java.io.*;

public class Main
{
    public static void main (String[] args) throws java.lang.Exception
    {
        //your code here
      Scanner sc = new Scanner(System.in);
        int r = sc.nextInt();
        int c = sc.nextInt();
        int mat[][] =new int[r][c];
        for (int i =0; i<r ; i++){
            for (int j=0; j<c; j++){
                mat[i][j] = sc.nextInt();
            }
        }
      int top =0;       int bottom = r-1;
      int right= c-1;   int left =0;
      while(top <= bottom && left <=right)
      {
        for(int i= left; i<=right; i++)
          {
            System.out.print(mat[top][i] +" ");

          }
        top++;
         for(int i= top; i<=bottom; i++)
          {
            System.out.print(mat[i][right] +" ");

          }
        right--;
        if(top<=bottom)
        {
          for(int i=right; i>= left; i--)
            {
               System.out.print(mat[bottom][i]+ " ");

            }
          bottom--;
        }
        if(left<=right)
        {
          for(int i=bottom; i>= top; i--)
            {
               System.out.print(mat[i][left] +" ");

            }
          left++;
        }
      }
    }
}