N = int(input())
x = [0]*N
for i in range(N):
    x[i] = input()
    x[i] = x[i].split(" ")
    x[i] = [int(j) for j in x[i]]

even_even = 0
odd_even = 0
even_odd = 0
odd_odd = 0
for i in range(N):
    if( x[i][0]%2 == 0 )and(x[i][1]%2 == 0):
        even_even = even_even + 1
    elif( x[i][0]%2 == 1 )and(x[i][1]%2 == 0):
        odd_even = odd_even + 1
    elif( x[i][0]%2 == 0 )and(x[i][1]%2 == 1):
        even_odd = even_odd + 1
    elif( x[i][0]%2 == 1 )and(x[i][1]%2 == 1):
        odd_odd = odd_odd +1
    else:
        print("number is not int")

print(even_even,odd_even,even_odd,odd_odd)
count = ((even_even//2)+(odd_even//2)+(even_odd//2)+(odd_odd//2))%2
if count==1:
    print("Alice")
else:
    print("Bob")