#include<stdio.h>
void main()
{
    int n;
    if(scanf("%d",&n)!=1){
        printf("Invalid Input");
        return;
    }
    if(n<0 || n>10 || n%2==0){
        printf("Invalid Input");
        return;
    }
    for(int i=n;i>=n;i-2){
        for(int s=0;s<=i;++s){
            printf(" ");
        }
        for(int j=0;j<=n;j++){
            printf("*");
        }
    printf("\n");
    }
}