#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n;
	cin>>n;
	for (int i=1;i<=n;i++)
	{
		for (int j=1;j<=n;j++)
		{
			if(i==(n+1)/2)
			{
			    cout<<"-";
			}
			else if(j==1||j==n)
			{
			    cout<<"|";
			}
			else
			{
			    cout<<"a";
			}
		}
		if(i!=n)
		{
			cout<<'\n';
		}
	} 
	return 0;
}