#include <iostream>
#include <iomanip>
using namespace std;

int main(){
	int a[10][10];
	int i,j,n;
	cin>>n;
	
	for (i = 0;i < n;i++){
		for (j = 0;j < n;j++){
			if (i + j + 1 <= n){
				a[i][j] = i + j + 1 + 64;
			}else{
				a[i][j] = i + j + 1 - n + 64;
			}
		}
	}
	
	for (i = 0;i < n;i++){
		for (j = 0;j < n;j++){
			cout<<setw(3)<<char(a[i][j]);
		}
		cout<<endl;
	}
}
/**************************************************************
	Problem: 1194
	User: admin
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/