#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,i,j,s=65;
	cin>>n;
	for(i=1;i<=n;i++){
		for(j=1;j<=n-i;j++){
			cout<<" ";
		}
		for(j=s;j>=65;j--){
			cout<<char(j);
		}
		for(j=66;j<=s;j++){
			cout<<char(j);
		}
		s++;
		cout<<endl;
	}
	return 0;
}

/**************************************************************
	Problem: 1096
	User: zzz
	Language: C++
	Result: Accepted
	Time:13 ms
	Memory:2072 kb
****************************************************************/