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