#include <bits/stdc++.h>
using namespace std;

vector<string> build(int n) {
    int size = 2 * n;
    if (n == 3) {
        return {
            "AAAAAA",
            "ABBBAA",
            "ABBBBA",
            "ABBBBA",
            "ABBBBA",
            "ABBBAA"
        };
    }
    if (n == 4) {
        return {
            "AAAAAAAA",
            "AAAAAAAA",
            "ABBBBAAA",
            "ABBBBBBA",
            "ABBBBBBA",
            "ABBBBBBA",
            "ABBBBBBA",
            "ABBBBAAA"
        };
    }

    int squareSize = 2 * n - 3;
    vector<string> grid(size, string(size, 'A'));

    grid[0][0] = 'B';
    grid[0][1] = 'B';
    grid[1][0] = 'B';

    for (int row = 1; row <= squareSize; row++) {
        for (int col = 1; col <= squareSize; col++) {
            grid[row][col] = 'B';
        }
    }

    long long removeCount = 1LL * squareSize * squareSize + 3 - 2LL * n * n;
    for (int row = squareSize; removeCount > 0; row--) {
        int take = static_cast<int>(min<long long>(squareSize - 1, removeCount));
        for (int col = squareSize - take + 1; col <= squareSize; col++) {
            grid[row][col] = 'A';
        }
        removeCount -= take;
    }

    return grid;
}

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

    int n;
    cin >> n;

    if (n <= 2) {
        cout << -1 << '\n';
        return 0;
    }

    vector<string> grid = build(n);
    for (const string& row : grid) {
        cout << row << '\n';
    }

    return 0;
}