n = io.read("*number")
tb = {[0]=0,[1]=0,[2]=0,[3]=0}
for i = 1, n do
  x = io.read("*number")
  y = io.read("*number")
  tb[(x%2) + (y%2)*2] = tb[(x%2) + (y%2)*2] + 1
end
a = 0
for i = 0, 3 do
  a += tb[i]/2
end

if a%2 == 0 then
  print("Bob");
else
  print("Alice");
end