def ascan; gets.split.map(&:to_i);end

n = gets.to_i

dom = [0]*4

n.times do 
    x,y = ascan
    d = x%2 + (y%2)*2
    dom[d] += 1
end

a = dom.map{|e|e/2}.reduce(:+)

if a.even?
    puts "Bob"
else
    puts "Alice"
end