N = int(input())
#[[偶々],[偶奇],[奇偶],[奇々]]
l = [0,0,0,0]
for _ in range(N):
  x,y = map(int,input().split())
  if x%2 == 0 and y%2 == 0:
    l[0] += 1
  elif x%2 == 0 and y%2 != 0:
    l[1] += 1
  elif x%2 != 0 and y%2 == 0:
    l[2] += 1
  else:
    l[3] += 1

count = l[0]//2+l[1]//2+l[2]//2+l[3]//2

if count%2 == 0:
  print("Bob")
else:
  print("Alice")