#include <stdio.h>
int main() {
    int m,n;
    scanf("%d %d", &m, &n);
    if(m < 0 || n < 0) {
        printf("-1");
        return 0;
    }
    int a[100][100];
    for(int i=0;i<m;i++){
        for(int j=0;j<n;j++){
            scanf("%d",&a[i][j]);
        }
    }
    int top = 0, bottom = m - 1;
    int left = 0, right = n-1;
    while(top <= bottom && left <= right){
        for(int i = left; i <= right; i++)
        printf(" %d",a[top][i]);
        top++;
        for(int i = top; i <= bottom; i++)
        printf(" %d",a[right][i]);
        right--;
        if(top <= bottom){
        for(int i = right; i >= left; i--)
        printf(" %d",a[bottom][i]);
        bottom--;
    if(top <= bottom){
        for(int i = right; i >= left; i--)
        printf(" %d",a[bottom][i]);
        bottom--;
    }
    if(left <= right){
        for(int i = bottom; i >= top; i--)
        printf(" %d",a[i][left]);
        left++;
       }
    }