n=int(input())
i=65
while i<n+65:
    j=0
    k=0
    while k<n+64-i:
        print(" ",end="")
        k=k+1
    while j<(i-65)*2+1:
        print(chr(j+65),end="")
        j=j+1
    i=i+1
    print()
/**************************************************************
	Problem: 1095
	User: admin
	Language: Python
	Result: Accepted
	Time:89 ms
	Memory:34480 kb
****************************************************************/