#include <stdio.h>

int main(void)
{
		const int Count = 26;

		for ( int i=0; i<Count; i++ )
		{
                                int j;
				for ( j=0; j<Count-(i+1); j++ )
						printf (" ");
				for ( j='A'; j<='A'+i; j++ )
						printf ( "%c", j );
				for ( j='A'+i-1; j>='A'; j-- )
						printf ( "%c", j );
				printf ("\n");
		}

		return 0;
}