import java.util.*;
public class Main {
public static void main(String args[]) {
Scanner scan = new Scanner(System.in);
int n = scan.nextInt();
int m = scan.nextInt();
int[][] matrix = new int[n][m];
for(int i=0;i<n;i++){
for(int j=0;j<m;j++)matrix[i][j] = scan.nextInt();
}
int top = 0;
int left = 0;
int right = matrix[0].length -1;
int bottom = matrix.length - 1;
int dir = 0;
while(top < bottom && left < right){
switch(dir){
case 0:
for(int i = top;i<=bottom;i++){
System.out.print(matrix[i][left] + ", ");
}
left++;
dir++;
case 1:
for(int i=left;i<=right;i++){
System.out.print(matrix[bottom][i] + ", ");
}
bottom–;
dir++;
case 2:
for(int i=bottom;i>=top;i–){
System.out.print(matrix[i][right] + ", ");
}
right–;
dir++;
case 3:
for(int i =right;i>=left;i–){
System.out.print(matrix[top][i] + ", ");
}
top++;
dir = 0;
}
}
System.out.print("END");
}
}