{}
def diamond(n):
alphabets = "A B C D E F G H I J K L M N O P Q R S T U V W X Y Z"
for i in range(n):
print(' ' * (n-i) + alphabets[:2*i+1])
for i in range(n-2, -1, -1):
print(' ' * (n-i) + alphabets[:2*i+1])
diamond(3)
diamond(5)