#include<bits/stdc++.h>
using namespace std;
int main(){
  int n,m,j;
  char a='A';                                                                                                                                                                           
  cin>>n;
  for(j=1;j<=n;j++){
    for(m=1;m<=n-j;m++) cout<<" ";
    for(m=1;m<=j*2-1;m++) cout<<a;
    a++;
    cout<<endl;
}
return 0;
}
/**************************************************************
	Problem: 1094
	User: wtq001
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/