#include<stdio.h>
int main(){
    int m,n;
    if(scanf("%d %d",&m, &n)!=2)return 0;
    if(m<0||n<0){
        printf("-1\n");
        return 0;
    }
    if(m==0||n==0){
        printf("\n");
        return 0;
    }
    int total=m=n;
    int mat[m][n];
    for(int j=0;j<n;j++){
        scanf("%d",&mat[i][j]);
    }
}
int top=0;bottom=m-1;
int left=0;right=n-1;
int printed=0;
while(top<=bottom&&left<=right){
    for(int j=left;j<=right&&printed<total;i++){
        printf("%d",mat[i][right]);
        printed++;
        if(printed<total)printf(" ");
    }
    top++;
    for(int i=top;i<=bottom&&printed<total;i++){
        printf("%d",mat[i][right]);
        printed++;
        if(printed<total)printf(" ");
    }
    right--;
    if(top<=bottom){
        for(int j=right;j>=left&&printed<total;j--){
            printf("%d",mat[bottom][j]);
            printed++;
            if(printed<total)printf(" ");
        }
        botttom;
    }
    if(left<=right){
        for(int i=bottom;i>=top&&printed<total;i--){
            printf("%d",mat[i][left]);
            printed++;
            if(printed<total)printf(" ");
        }
        left++;
    }
}
printf("\n");
return 0;
}
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
        }
    }

    }
}