#include<bits/stdc++.h> using namespace std; int main(){ cout<<" A"<<endl; cout<<" BAB"<<endl; cout<<" CBABC"<<endl; cout<<" DCBABCD"<<endl; cout<<"EDCBABCDE"<<endl; return 0; }

#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+1;j++) cout<<" ";
		for(int j=i-1;j>=1-i;j--){
			a=65+abs(j);
			cout<<a;
		}
		cout<<endl;
	}
}