N = int(input())
L = [[int(l) for l in input().split()] for _ in range(N)]

memo = [0]*4
for i in range(N):
    if L[i][0]%2 == 0 and L[i][1]%2 == 0:
        memo[0] += 1
    elif L[i][0]%2 == 0:
        memo[1] += 1
    elif L[i][0]%2 == 1 and L[i][1]%2 == 0:
        memo[2] += 1
    else:
        memo[3] += 1

num = memo[0]//2 + memo[1]//2 + memo[2]//2 + memo[3]//2
if num%2 == 1:
    print("Alice")
else:
    print("Bob")