#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 / 2 + 1)){
                cout << "-";
            }else{
                cout << "a";
            }
        }
        cout << endl;
    }
	return 0;
}