#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 (j == 1 || j == n)
                cout << "|";
            else if (i == (n + 1) / 2) {
                cout << "-";
            } else
                cout << "a";
        }
        cout << endl;
    }

    return 0;
}