#include<bits/stdc++.h>
using namespace std;
 
int main() {
	int row,col;
    cin>>row>>col;
    int a[row][col];
    for(int i=0;i<row;i++){
    	for(int j=0;j<col;j++){
    		cin>>a[i][j];
    	}
    }
	int cs=0,ce=col-1,rs=0,re=row-1;
	while(re>=rs && ce>=cs){
 
		for(int i=ce;i>=cs;i--){
			cout<<a[rs][i]<<" ";
		}
		rs++;
		for(int i=rs;i<=re;i++){
			cout<<a[i][cs]<<" ";
		}
		cs++;
		for(int i=cs;i<=ce;i++){
			cout<<a[re][i]<<" ";
		}
		re--;
		for(int i=re;i>=rs;i--){
			cout<<a[i][ce]<<" ";
		}
		ce--;
	}
	return 0;
}

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5   4
1   2   3   4
5   6   7   8
9   10 11 12
13 14 15 16
17 18 19 20