#include <bits/stdc++.h>
// #include <atcoder/all>
using namespace std;
// using namespace atcoder;
#define rep(i, a, n) for(int i = a; i < n; i++)
#define rrep(i, a, n) for(int i = a; i >= n; i--)
#define inr(l, x, r) (l <= x && x < r)
#define ll long long
#define ld long double

// using mint = modint1000000007;
// using mint = modint998244353;
constexpr int IINF = 1001001001;
constexpr ll INF = 1e18;

template<class t,class u> void chmax(t&a,u b){if(a<b)a=b;}
template<class t,class u> void chmin(t&a,u b){if(b<a)a=b;}


int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int n; cin >> n;
    if(n <= 2){
        cout << -1 << endl;
        return 0;
    }

    vector<string> ans(2*n, string(2*n, 'B'));
    rep(i, 0, 2*n){ 
        rep(j, 0, 2*n){
            if(i == 0 || i == 2*n-1 || j <= n-3) ans[i][j] = 'A';
        }
    }
    rep(i, 0, n-2){
        ans[i+1][n-2] = 'A';
        ans[2*n-2-i][2*n-1] = 'A';
    }
    rep(i, 0, 2*n){
        cout << ans[i] << endl;
    }
    
    return 0;
}