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