include<bits/stdc++.h>

using namespace std;
int main()
{
int n;
while(cin>>n)
{ for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
if(j==0||j==n-1) cout<<"* ";
else if(i==n-1||i==0) cout<<"* ";
else cout<<" ";
}
cout<<endl;
}
}
return 0;
}