n = read_line.to_i
if n <= 2
  puts -1
  exit
end
if n == 3
  puts ["AAAAAA",
        "ABBBBB",
        "ABBBBB",
        "ABBBBB",
        "ABBBAA",
        "AAAAAA",
  ].join("\n")
elsif n == 4
  puts [
    "AAAAAAAA",
    "ABBBBBBB",
    "ABBBBBAB",
    "ABBBBBAA",
    "ABBBBBAA",
    "ABBBBBAA",
    "ABBBBAAA",
    "AAAAAAAA",
  ].join("\n")
else
  s = Array.new(n * 2) { Array.new(n * 2, 'A') }
  1.upto(n * 2 - 2) do |i|
    s[1][i] = 'B'
    s[i][1] = 'B'
  end
  s[1][-2] = 'B'
  s[1][-1] = 'B'
  s[2][-1] = 'B'
  cb = s.sum { |r| r.count('B') }
  ca = n * n * 4 - cb
  2.upto(n * 2 - 2) do |i|
    2.upto(n * 2 - 3) do |j|
      break if ca == cb
      s[i][j] = 'B'
      ca -= 1
      cb += 1
    end
  end
  puts s.map { |r| r.join }.join("\n")
end