#include<bits/stdc++.h>
using namespace std;
int main(){
int a,x,n;
cin>>n;
for(int i=1;i<=n;i++){
    for(int j=1;j<=n-i;j++) cout<<" ";
    for(int j=1;j<=2*i-1;j++) {
        cout<<(char)(i+64);
    }cout<<endl;
}
    return 0;
}
/**************************************************************
	Problem: 1094
	User: fuyijun
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/