#line 1 "codes/Libraries/Core.hpp"



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

using ll = long long;
using ull = unsigned long long;

#define rep(i,n) for(int i=0; i<n; i++)
#define rrep(i,n,s) for (int i=s; i<n; i++)


#line 2 "codes/H.cpp"

int main()
{
	int n;
	cin>>n;
	if(n<3){
		cout<< -1 <<endl;
		return 0;
	}
	n*=2;
	int missing=n*n/2-((n-1)*4-3);
	rep(i,n){
		rep(j,n){
			if(i==0||j==0||j==n-1)cout<<"A";
			else{
				if(i==n-1){
					if(j==0||j>3)cout<<"A";
					else cout<<"B";
				}else{
					if(j==n-2)cout<<"B";
					else{
						if(missing-- >0)cout<<"A";
						else cout<<"B";
					}
				}
			}
		}
		cout<<endl;
	}
}