#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)
            printf(" %d",a[top][i]);
            to++;
            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;
}