n=int(input())
if n<=4:
    print(-1)
    exit()
n*=2
X=[]
for i in range(n):
    X.append(["B"]*(n))
    
a=0
for i in range(n):
    for j in range(n):
        if i in [0,n-2,n-1] or j in [0,n-2,n-1]:
            if not (i,j) in [(0,0),(0,1),(1,0)]:
                X[i][j]="A"
                a+=1
ZZ=[]
for i in reversed(range(n+10)):
    ZZ.append(i)
    ZZ.append(-i)
for d in ZZ:
    for i in range(-n-10,n+10):
        j=i+d
        if 0<=i<n and 0<=j<n:
            if X[i][j]=="B":
                X[i][j]="A"
                a+=1
                if a==(n**2)//2:break
    if a==(n**2)//2:break
              
  
for I in X:print("".join(I))