#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[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;
}