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