import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

N = int(readline())
m = map(int,read().split())
XY = zip(m,m)

counter = [0] * 4
for x,y in XY:
    x &= 1
    y &= 1
    counter[x+y+y] += 1

can_del = sum(x//2 for x in counter)

answer = 'Bob' if can_del % 2 == 0 else 'Alice'
print(answer)