#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";
}
}
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