#include <bits/stdc++.h>
using namespace std;
int main()
{
	int n,j,i;
	char a;
	cin>>n;
	for(i=1;i<=n;i++) {
	
		for(j=1;j<=n-i;j++) cout<<" ";
		
		for(j=i;j>1;j--)
		{
			a=j+64;
			cout<<a;
		}
		for(j=1;j<=i;j++)
		{
			a=j+64;
			cout<<a;
		}
		cout<<endl;
		}
	
	
	
	return 0;
}

/**************************************************************
	Problem: 1096
	User: 21A
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/