// editor2
#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;j < n;j++){
            scanf("%d",&matrix[i][j]);
        }
    }
    int top = 0, bottom = m - 1;
    int lift = 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 <= righr){
            for (int i = bottom; i >= top; i--){
                printf("%d ",matrix[i][left]);
            left++;
            }
        }
        
        return 0;
}