from collections import deque
from collections import Counter
from itertools import permutations

def main():
    N = int(input())
    XY = tuple(tuple(map(int, input().split())) for _ in [0] * N)

    cnt = 0
    for i in range(N - 1):
        for j in range(i + 1, N):
            x1, y1 = XY[i][0], XY[i][1]
            x2, y2 = XY[j][0], XY[j][1]
            if not (x1 - x2) & 1 and not (y1 - y2) & 1:
                cnt += 1

    if cnt & 1:
        print('Alice')
    else:
        print('Bob')

main()