n = int(input())
if n <= 2:
	print(-1)
	exit()
n *= 2
ans = [['A']*n for _ in range(n)]
h = n-1
w = (n*n//2)//h + 1
res = h*w - (n*n//2)
for i in range(1,n):
	for j in range(1,w+1):
		if res > 1:
			res -= 1
		else:
			ans[i][j] = 'B'
ans[n-1][w] = 'A'
for i in ans:
	print("".join(i))