#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<= rihgt; 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++;n
        }
    }
}
}