import java.util.Scanner;
public class Main {
public static void main(String args[]) {
Scanner scn = new Scanner(System.in);
int rows = scn.nextInt();
int cols = scn.nextInt();
int[][] arr = new int[rows][cols];
for (int i = 0; i < arr.length; i++) {
for (int j = 0; j < arr[i].length; j++) {
arr[i][j] = scn.nextInt();
}
}
spiralprint(arr);
}
private static void spiralprint(int[][] arr) {
int top = 0;
int bottom = arr.length - 1;
int dir = 2;
int count = (bottom + 1) * (bottom + 1);
while (top <= bottom) {
if (count > 0) {
if (dir == 2) {
for (int i = 0; i <= bottom; i++) {
System.out.print(arr[i][top] + ", ");
count--;
}
dir = 4;
}
top += 1;
}
if (count > 0) {
if (dir == 4) {
for (int i = bottom; i >= 0; i--) {
System.out.print(arr[i][top] + ", ");
count--;
}
dir = 2;
}
top += 1;
}
}
System.out.println("END");
}
}