#include <stdio.h>
int main(){
    int n;
    scanf("%d",&n);
    if(n <= 0 || n > 10){
        
            printf("Invaliud input\n");
            return 0;
        }
        int size =2 * n -1;
        for(int i = 0; i < size;i++){
            for  (int j =  0; i < size,j++){
                int main = i < j ? i : j;
                min = min < size - i ?min : size - i - 1;
                min = min < size - j - 1 ? min : size - j - 1;
                printf("%d", n -min);
            }
            printf("%d", n - min);
        }
       return 0; 
    
}