#include <iostream>
using namespace std;
int N;
int main()
{
cin>>N;
if(N==1)
{
cout<<"*";
return 0;
}
for(int x=1; x<=N; x++)
{
for(int y=1; y<=N; y+=2)
{
if(y!=1)cout<<" ";
cout<<"*";
}
cout<<endl;
for(int z=2; z<=N; z+=2)
{
cout<<" *";
}
cout<<endl;
}
}