a = [[0, 0], [0, 0]]
n = gets.to_i
n.times do
  x, y = gets.chomp.split.map(&:to_i)
  i = x.even? ? 0 : 1
  j = y.even? ? 0 : 1
  a[i][j] += 1
end
x = 0
2.times do |i|
  2.times do |j|
x ^= (a[i][j] / 2) % 2
  end
end
puts x == 0 ? :Bob : :Alice