#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 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++;
    }
return0;
}
    


    }
    }
}