#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[i][right]);
            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++;n
                
            }
        }
        
    }
}