#include <iostream>

using namespace std;

const int N = 101;
int n, m;
int i, j;
char a[N][N];

int main() {
	cin >> n;
	m = (n + 1) / 2;
	for (i = 0; i < n; i++) {
		for (j = 0; j < n; j++) {
			if (j == 0 || j == n - 1)
				a[i][j] = '|';
			else if (i == m - 1)
				a[i][j] = '-';
			else
				a[i][j] = 'a';
		}
	}
	for (i = 0; i < n; i++) {
		for (j = 0; j < n; j++) {
			cout << a[i][j];
		}
		cout << '\n';
	}
	return 0;
}