#include <iostream>
#include <vector>
#include <string>
using namespace std;

int main(){
	int N; cin>>N;
	if (N<=3){
		cout<<"-1"<<endl;
		return 0;
	}
	vector<string> S(2*N, "");
	int B = (2*N-2)*(2*N-2), A = 4*N*N-B;
	int C = (B-A)/2;
	int r = 4;
	string all = "";
	for (int i=0; i<2*N; i++) all += 'A';
	for (int i=0; i<2*N; i++){
		if (i==0||i==2*N-1){
			S[i] = all;
		} else {
			for (int j=0; j<2*N; j++){
				if (j==0||j==2*N-1) S[i] += 'A';
				else S[i] += 'B';
			}
		}
	}
	for (int i=2*N-2; i>1; i--){
		if (C<=0) break;
		if (r*(2*N-4)<C){
			S[i] = all;
			C -= N-2;
			r++;
		} else {
			C -= r;
			for (int j=0; j<r; j++){
				S[i-j][2] = 'A';
			}
			for (int j=0; j<r; j++){
				for (int k=3; k<2*N-2; k++){
					if (C==0) break;
					S[i-j][k] = 'A';
					C--;
				}
			}
		}
	}
	for (int i=0; i<2*N; i++) cout<<S[i]<<endl;
}