90.cpp

/*
	input = 5;
	output:
	E       E
	 D     D
	  C   C
	   B B
	    A
*/

#include <bits/stdc++.h>
using namespace std;
#define fast_io ios::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define ll long long

int main()
{
	fast_io;
	int i,j,k,r = 1,n,q;
	char c;
	cin>>n;
	for(i=1;i<=n;i++)
	{
		for(j=1;j<i;j++)
			cout<<" ";
		for(j=1;j<=n-i+1;j++)
		{
			c = 'A' + n - i;
			if(j == 1 || j == n-i+1)
				cout<<c<<" ";
			else
				cout<<"  ";
		}
		cout<<endl;
	}
    
    return 0;
}