#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=i;m>1;m--){
            cout<<b;
            b--;
        }
        for(m=1;m<=i;m++){
            cout<<b;
            b++;
        }
        cout<<endl;
    }   
    return 0;
}
/**************************************************************
	Problem: 1096
	User: wengzihang
	Language: C++
	Result: Accepted
	Time:12 ms
	Memory:2072 kb
****************************************************************/