#include<iostream>
using namespace std;
 
int main()
{
	int n;
	cin>>n;
	
	int w = (2*n)-2;
	
	for(int i=1;i<=n;i++)
	{
		for(int j=1;j<=i;j++)
		{
			cout<<"*";
		}
		
		for(int k=1;k<=w;k++)
		{
		       cout<<" ";
		}
		
		for(int j=1;j<=i;j++)
		{
			cout<<"*";
		}
		
		
		w=w-2;
		
		cout<<"\n";
	}
}