#include<iostream>
using namespace std;
int main(){
	int i,j,n;
	cin>>n;
	char c;
	for(i=1;i<=n;i++){
		for(j=1;j<=n-i;j++){
			cout<<" ";
		}
		for(j=i;j>=2;j--){
			c=j+64;	
			cout<<c;
		}
		for(j=1;j<=i;j++){
			c=j+64;
			cout<<c;
		}
		cout<<endl;
	}
}
/**************************************************************
	Problem: 1096
	User: admin
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/