#include<bits/stdc++.h>
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: wangyiyang
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/