#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,i,m;
	cin>>n;
	char b='A';
	for(i=1;i<=n;i++){
		for(m=n-i;m>=1;m--){
			cout<<" ";
		}
		for(m=1;m<=2*i-1;m++)
			cout<<b;
		cout<<endl;
		b++;
	}	
	return 0;
}
/**************************************************************
	Problem: 1094
	User: houshanglin
	Language: C++
	Result: Accepted
	Time:15 ms
	Memory:2072 kb
****************************************************************/