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

	return 0;
}


/**************************************************************
	Problem: 1096
	User: lzc
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/