#include<iostream>
#include<conio.h>
using namespace std;
int no();
char c='A';

int no(){
	char a, b;


for(a='A' ; a<='C'; a++ )
	{
		for ( b= 'A' ; b<=a ; b++, c++)
		{
			cout<<" ";
		}

		for (char d='D'; d>a ; d--, c++)
		{
			cout<<c;
		}
		for(char c= 'C' ; c>a ; c--)
		{
			cout<<c;
		}


		cout<<endl;
	}

}

int main(){
char a, b;


	for(a='A' ; a<='C'; a++ )
	{
		for(char c= 'C' ; c>=a ; c--)
		{
			cout<<" ";
		}

		for ( b= 'A' ; b<=a ; b++, c++)
		{
			cout<<c;
		}

		for (char d='A'; d<a ; d++, c++)
		{
			cout<<c;
	}
		cout<<endl;
	}
	no();
	getch();
}